I don't think its fair to compare games that aren't ports from something else (
games that originated on PC Engine). Like Lords of Thunder. So Magical Chase and Bonk's Adventure and Military Madness are out.
Of course, by that logic it isn't fair to compare a Turbo port of a game that originated on another console, like Dynastic Hero/MWIII. But I think it's fine since this topic is 'best on PCE' and not a general port discussion.
The first game that I thought of is
Forgotten Worlds, even without the 2 player co-op. The gameplay is still more faithful since you're interacting with graphics that look like the arcade and the MD/SMS ports are more original. And aside from faithful portness, I believe its just a better game.
Although I feel that
Aeroblasters is a better
game on PC Engine, the Megadrive version is a
way better port and is almost identical to the arcade. But the PCE version is better than the arcade overall.
Ninja Spirit is not surprisingly, better on PCE than Gameboy.
If we're listing all ports that are best on Turbo, I'd be here all day, even if only choosing ones that are clearly better and not a toss up(like Street Fighter II). And I;m already late for work.
Should we each pick one best of the 'best on PCE' game as we list general 'best on PCE's?