I have a 68060 A4000 and an old AMD X2 3800+. 110 MIPS versus 14500. The X2 sure doesn't feel 100x faster
Higher RAM latency is an issue: up to 8 ns (originally 2ns). You must have been running Windows with a lot of processes.
Q: was the 4000 still snappy with a lot of things running, including virus scanner?