Yes the GPU Benchmark for example must be taken with doubts, it shows a result from ~255fps with glmark2 and --off-screen rendering switch with fbdev drivers on XU4 and 285fps on N1 and 305fps on N2, but the XU4 was able to do the same test with X11 drivers and 1200fps, but we do not have X11 drivers for N2, but from my experience the N1 and XU4 was relatively equal when it comes to real live gaming / emulation tests, maybe slightly better and not so stressed out like the XU4 with the same tasks in terms of temperature, also the Mali-G52 GPU is very new (Q1 2018) and maybe not fully supported from software side, so it's too early to make a clear statement.