This was always the issue with the Amiga and CPU upgrades due to the whole Amiga custom chips.
Crap scrolling and slow fighters on Street Fighter 2 on MS DOS playing on your 386? Get a 486DX and everything magically improves to arcade levels of quality. On Amiga you can load up US Gold's SF2 conversion on an 060 you spent £750 on and it will still be mildly better than a £299 ST.
I also started a thread about a year ago about why the hell was Amiga basically given such bad coin-op conversions. The Amiga is capable of something close to Sonic if you look at Kid Chaos, ditto Outrun and Lotus II, Shadow Fighters and SF2 etc etc.
It is quite sad looking back just how bad many conversions were and the best software was mostly original arcade games not arcade conversions. Luckily there were 1000s of games and there are plenty that will make your jaw drop.
Add to that there were plenty of more intellectual games like the Magnetic Scrolls adventures which were just pure class and superior to the PC versions

If it was out on OCS/ECS then PC version would be EGA = PANTS! :roflmao: