According to recent rumors, the Pixel 5 is likely to end up with a 6-inch OLED screen with 90Hz refresh rate, and both the Pixel 5 and the upcoming Pixel 4a 5G should end up with Qualcomm's Snapdragon 765G SoC. The Snapdragon 765G should be paired up with 8GB of RAM and 128GB of storage on the Pixel 5.
In case you missed it, the Snapdragon 765G is a 7nm octa-core SoC with Cortex-A76 Prime and Cortex-A76 Performance cores, as well as a six-core cluster of Cortex-A55 Efficiency cores. It has Adreno 620 GPU, Hexagon 696 DSP, Qualcomm Spectra 355 ISP, FastConnect 6200, and Snapdragon X52 5G modem system. It also comes with select Snapdragon Elite Gaming features, like Qualcomm Game Smoother, Qualcomm Game Fast Loader, and Qualcomm Game Network Latency Manager.
In addition, the Pixel 5 should be getting a better camera system, which could be featuring a main and ultra-wide lens, something that could be interesting since the Pixel 4a comes with a telephoto one.
In any case, we'll know for sure when the Pixel 5 and Pixel 4a 5G are announced on September 30th.