I like this guy - he's good. Covers lots of old C=64 + other platforms like MSX. Lots of stuff I only heard of decades ago but the multi-platform comparisons are liquid awesome.
http://frgcb.blogspot.com/
ex.
I had no idea Al Lowe made Donald Duck for c64 originally. Then made sierra agi version. Sound differences are important to me.
Same with Wizball - ntsc vs pal. And not just music tempo either.