I had a G4 MacBook when I switched to the first-gen Intel MacBooks, and subjectively, the G4 performed much, much better. Probably because the best pairing for any Intel CPU is thermal throttling.
A lot of the important applications took a while to get ported. Also the last two generations of G4 hardware just overclocked basically unchanged chips. The 12" G4 laptop was infamous for slowly cooking your junk with their titanium shell.
I lived through the PPC->Intel transition porting real Mac apps, and "I liked the G4 laptops better" is definitely not a take I heard from anyone back then...