I know you wanna quit the discussion (and that's probably a good idea), but a very small few filmation-style games DID appear on the C64. Head over Heels, for instance, was so popular that it made a C64 appearance.
However, the graphical style of the C64 and the ZX Spectrum were radically different. The graphics of C64 games, when pushed to the limit, could very easily rival, if not exceed, those of the NES (especially with the continued C64 efforts by fans. Though, NES had Elite, so it's best not to push this argument at all).
The ZX Spectrum, however, had those iconic one-color sprites we all adore, and was prone to slowdown in the case of too many sprites. It's simply impossible to have a game that looks like your average C64 game. The C64 was simply more powerful. Doesn't mean it was any better. There are plenty of people who will argue over which they liked more, and the C64 didn't have Ultimate (who later became Rare, and even included the Spectrum classic 'Jetpac' in Donkey Kong 64) developing games on it. :)
Both systems had a good amount of isometric games, however. The ZX Spectrum had much more, thanks to Ultimate and their filmation engine, starting with Knight Lore. It quickly took off as THE genre for the Spectrum. The isometric viewpoint was, aside from first-person dungeon games, the closest thing to 3D at the time, so it was a fairly popular thing to do.
Because of the region that Rare and the Spectrum (as well as C64, which was even more popular in the UK) were in, isometric-style games became far more popular in Europe than they ever were in America or Japan. Most isometric games, even in the NES\GB (such as Solstice, Altered Space, Monster Max, Adventures of Pinocchio, Snake Rattle N' Roll, and Looney Tunes Twouble) and SNES\Genesis era (Equinox, Sonic 3D Blast), have been primarily developed by European developers, especially the UK.
It's why you'll find a lot more people in the US who play an isometric platformer complain about the controls than across the pond. XD
bazilisek: It's because the OP is a pompous, ignorant, pretentious dipshit who thinks he's better and smarter than everyone else, brags about how he's totally not a talentless loser who lives in a cluttered crapshack who spent their entire childhood doing everything to avoid becoming a talentless loser, to the point of reading constantly and making only about four friends, and I'm just going to say all of this to his face here to try and get his goat, so he can try to defend himself and land at -100 rep.
No, really. If you're trying to get my goat, it's not gonna work. I already know what happens when I fight back here. Say whatever the hell you want to say.
Arteveld: Feels like You could... You could... like You could... TAKE ON THE WOOOORLD! *thunder*
Hoagie: I didn't think horses could talk.
Horse: Maybe they just never had anything to say to you. Ever think of that?
Hoagie: You mean horses have been snubbing me my whole life?
Horse: If you want to put it that way.
Love that game. :D