Ah yes, Amstrad CPC Plus Switchblade rocked.
I never had a C64, a friend did - Turrican and Turrican II were amazing. The CPC always sucked at scrolling platform games. I think it is a bit hard for me to find games that I've played on both an Amiga and C64.
I remember the Amstrad CPC version of Netherworld being really good, and the Atari ST version being a big pile of pants though. I downloaded the .mod for the Amiga version and it was terrible compared to the CPC music as well.
I'm a fan of chunky graphics though ... they work so much better when you have limited colour range. When someone bothered to use 32 colours on the Amiga, the graphics invariably improved, but in 16 colour mode they usually were meh compared to some 8-bit versions.