Asus ZenFone 6 vs Redmi K20 Pro [Comparison]

Asus ZenFone 6 vs Redmi K20 Pro [Comparison]
Image Source: Asus / YouTube video (screenshot)

Apple, Samsung, and many other vendors are busy increasing the prices of their flagship smartphones. It gives vendors like Asus and Xiaomi the opportunity to offer high-end smartphones to customers at less than half the price of flagship iPhones. Asus’ latest ZenFone 6 has gone on sale in European markets and will soon arrive in the US and other countries. Xiaomi’s sub-brand Redmi has launched the Redmi K20 Pro, which is being dubbed as “Flagship Killer 2.0.” Let’s find out how Redmi’s K20 Pro stacks up against the ZenFone 6.

ZenFone 6 vs Redmi K20 Pro: Design

Despite carrying mid-range price tags, both smartphones offer a premium design. They both have a notch-less display with slim bezels. They both retain the 3.5mm headphone jack. The rear panel of both handsets has a gradient finish, giving them a premium feel.

The ZenFone 6 gets dual stereo speakers to enhance the audio experience. It has the fingerprint sensor placed on the back panel. Its rear panel is curved on the sides, making it easier to hold the device in hand. It measures 158.94 x 75.58 x 9.1 mm and weighs 195g. The Asus flagship comes in Twilight Silver and Midnight Black colors. However, it lacks water-resistance.

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The ZenFone 6 features a Smart Key that allows users to activate Google Assistant or another app of their choice. The biggest highlight of the new ZenFone is the Flip Camera module. Made of Liquid Metal, the Flip Camera mechanism flips around to the front whenever you need to make video calls or take a selfie. It houses two cameras, and eliminates the need for a display notch.

According to Asus, the Flip Camera can withstand more than 100,000 flips. The module can also retract itself when you accidentally drop the phone. The Flip Camera also has free angle control, allowing users to control the amount of rotation and take pictures at different angles.

The Redmi K20 Pro uses a pop-up mechanism to house the selfie camera. Xiaomi claims its pop-up camera can be deployed in less than a second. On the rear panel, it sports a vertically aligned triple camera setup. Just like the ZenFone 6, its back is curved on the sides. The K20 Pro measures 156.7 x 74.3 x 8.8mm and weighs 191g.

The K20 Pro comes in Carbon Fiber Black, Flame Red, and Glacier Blue colors. It has a unique gradient finish that shimmers around the edges. Xiaomi has used an optical in-display fingerprint sensor on the Redmi K20 Pro, which is far more convenient than the rear-mounted fingerprint sensor on the ZenFone 6.


The ZenFone 6 gets a traditional LCD screen while the Redmi phone features a superior OLED display, which offers truer blacks and more vibrant colors.

The ZenFone 6 offers a 6.4-inch IPS LCD panel with 1080 x 2340 pixels resolution. It has an impressive 92% screen-to-body ratio, 600 nits of brightness, and 19.5:9 aspect ratio. The screen is protected by Corning Gorilla Glass 6.

The Redmi K20 Pro features a similarly-sized 6.39-inch AMOLED display with 1080 x 2340 pixels resolution. This phone also has 600 nits of brightness and 19.5:9 aspect ratio. It boasts a 91.9% screen-to-body ratio. The device also offers hardware DC dimming support.

Internal specs

The two handsets have similar hardware specs. They both run the same Qualcomm Snapdragon 855 chipset that we have seen on many other Android flagships this year. The processor is paired with Adreno 640 GPU for graphics performance.

The ZenFone 6 comes in three different configurations: 6GB RAM with 64GB storage, 6GB RAM with 128GB storage, and top of the line 8GB RAM with 256GB storage. The device also has a microSD card slot that allows you to expand the memory by up to 2TB.

The K20 Pro will be available in four different RAM and storage configurations. There will be a 6GB+64GB version, a 6GB+128GB model, an 8GB+128GB variant, and an 8GB+256GB configuration. The phone also features a heat dissipation system to prevent it from overheating when you are playing high-end games.

The ZenFone 6 packs a 5,000mAh battery. It supports 18W Quick Charge 4.0 technology. The battery is large enough to get you through two days of normal usage on a single charge. Asus says the bigger battery size also leads to fewer charging cycles, which enhances the battery longevity.

The K20 Pro includes a 4,000mAh battery. It supports 27W fast charging, which we have seen on Xiaomi’s Mi 9 and Black Shark 2 handsets. It delivers 100% in just 50 minutes.


They are both Android phones running the latest Android 9 Pie software. But the skin on top of Android s different. The ZenFone 6 runs Asus’ revamped Zen UI 6, which offers a clean and blazing fast experience. It’s pretty close to the stock Android experience with some of Asus’ goodies. The company has improved the launch time and memory management with Zen UI 6. Asus also promises at least two years of timely software updates and security patches.

The Redmi K20 Pro runs Xiaomi’s MIUI 10 skin. It brings a built-in Game Turbo 2.0 feature that allocates necessary resources to gaming to ensure that you don’t experience any lag. It also gets a Night Vision mode that brightens the dark scenes in games for better visibility.


The Redmi K20 Pro camera hasn’t been tested by independent firms yet. In contrast, DxOMark found in its tests that the Asus ZenFone 6 camera takes excellent photos both in bright light and low-light conditions. Considering the Flip Camera module serves as both the front and rear camera, you can expect great results from the phone.

The ZenFone’s Flip Camera setup uses a stepper motor to rotate based on whether you want to use it as a selfie camera or main camera. It consists of a 48MP primary lens with dual LED flash and f/1.8 aperture. The secondary camera is a 13MP ultra-wide angle lens with a 125-degree field of view. It gets Night Mode and HDR+ Enhanced mode to take better pictures. The ZenFone 6 can record 4K videos at 60fps with EIS.

The Redmi K20 Pro sports a 48MP primary lens with f/1.75 aperture, a 13MP ultra-wide angle lens, and an 8MP telephoto lens with f/2.4 aperture. It can record 960fps slow-motion videos. It gets a 20MP AI camera for selfies. The selfie camera is placed in a pop-up mechanism.


The ZenFone 6 has gone on sale in Europe. You can purchase the device via the Asus website. It costs EUR 499 for the 6GB+64GB model, EUR 559 for the 6GB+128GB version, and EUR 599 for the 8GB+256GB variant. Asus hasn’t revealed the US pricing and availability, only saying the product will become available “in the summer.” You can subscribe on the company’s US website to get notified when it becomes available.

The Redmi K20 Pro is set to go on sale in China on June 1st. Other markets such as India are expected to get the device later in June. It has been priced at CNY 2,499 for the base model with 6GB RAM and 64GB internal storage. The 6GB+128GB model costs CNY 2,599 while the 8GB+128GB version has been priced at CNY 2,799. The top of the line 8GB+256GB model costs CNY 2,999.

Asus ZenFone 6 vs Redmi K20 Pro Specs

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