Oh come one, you are comparing DDR4 vs DDR5 …
And you are showing the polyphony graph, generaly once you bounce the MIDI to Audio this becomes irrelevant, but whatever.
No user will ever reach 1080 polyphony at a buffer of 64, this is a benchmark software, this does not show real-life usage at all 
The real processing graph is that one, and it shows almost no difference between RAM speed :
