The Xiaomi Pad 4 is generally considered the better choice among the Xiaomi 4 tablet lineup. This is due to its superior specifications, including a more powerful processor, higher resolution display, and longer battery life compared to the Xiaomi Pad 4 Pro.

The Xiaomi Pad 4 is powered by an octa-core Snapdragon 860 processor, which offers better performance and efficiency than the Snapdragon 730G in the Xiaomi Pad 4 Pro. According to AnTuTu benchmarks, the Xiaomi Pad 4 scores around 560,000 points, while the Xiaomi Pad 4 Pro scores around 490,000 points. This indicates a significant performance gap in favor of the Xiaomi Pad 4.

In terms of display, the Xiaomi Pad 4 features a 10.95-inch 2K resolution LCD panel, providing a crisp and clear viewing experience. The Xiaomi Pad 4 Pro, on the other hand, has a 10.95-inch 120Hz OLED display, which is visually stunning but consumes more power and may not be necessary for most users. The OLED panel also adds to the overall cost of the device.

Battery life is another area where the Xiaomi Pad 4 excels. The tablet is equipped with a 8600mAh battery, which offers up to 12 hours of continuous use on a single charge. The Xiaomi Pad 4 Pro, with its 8900mAh battery, offers similar battery life, but the OLED display consumes more power, potentially reducing the actual usage time.

Additionally, the Xiaomi Pad 4 comes with 6GB of RAM and 128GB of storage, which is expandable via a microSD card slot. The Xiaomi Pad 4 Pro offers 8GB of RAM and 256GB of storage, but the higher price point may not justify the additional storage and RAM for most users.

In conclusion, the Xiaomi Pad 4 is the better choice among the Xiaomi 4 tablet lineup due to its more powerful processor, higher resolution display, and longer battery life. The Xiaomi Pad 4 Pro, while offering a visually stunning OLED display, is not necessarily a better choice for most users due to its higher price and potential battery life concerns.