@dos, Could you post the output of "sudo hardinfo -r" for the two phones? That would give us some benchmarks for the CPU and GPU performance.
Does "lshw" show the RAM speed on the PinePhone? (I'm assuming this is not the actual speed, but the top rated speed of the RAM stick, but I'm curious what it says.)
@dos, It looks like people are experimenting with many RAM speeds on the PinePhone: https://forum.pine64.org/showthread.php?tid=9832
According to the poll, 7/16 can run the RAM at 624MHz.
@amosbatto Not sure to be honest, I'm using u-boot and kernel from Mobian repos - so I think it's 552MHz since some people had stability issues at 624MHz?