How dare you insult the honor of the Dreamcast!
HEATHEN
THERE AREN'T ANY DIFFERENCES
Hmm, odd that we're finally agreeing on something
Speaking of Zero 3, what are your opinions of the rebalancing in the Upper versions (DC, Arcade, and GBA)? The less damage fireballs seem to be a bit odd.
The re-balancing broke the game even further. Here's the ranking of Zero 3 ports, best to worst:
EDIT: Since it's 5:00 AM and I have nothing better to do I'll write up a detailed comparison...wish me luck at staying awake for work tomorrow...
CPSII - Best, though I'm in the minority on this. This will be the basis for comparison to the rest...
A note about it, it features most of the modes of the homeports, but they have to be unlocked over time (which isn't a problem anymore, the game is over 5 years old, they're unlocked already

) dramatic battle, no-ism, etc. etc. etc. are all there, check a trivia site for how to unlock them. Or I can look it up and post it here sometime if you're that worthless.

As stated the emulation features noticeable input lag.
Saturn - music fadeout too early, sounds downsampled, reasonable but still present loadtimes. Features better graphics than the arcade and a few tasty extras, though. None of which I actually make use of so I can't describe them in detail

added a few characters, changed dramatic battle from the arcade version, etc. I sold it, then bought it back, it's worth having I think. Just for the graphics whore in ya if nothing else. Friends can use the added SF2 characters so it's nice for vs. play. Based on the bugfixed version of the PCB so none of the bugs with Karin and Xism
Playstation - longass loads, I haven't picked up a japanese copy yet so I can't say how far the PS2 reduces them (enable an option in its menu to do this). Missing frames, and not just in the background...look at Karin walking for example. Sound is close to perfect, quality wise. Sadly they fucked up the order of the announcements (Leeet's party! triumph or die! instead of Let's party/go for broke, etc.) which I'm willing to admit is very minour, at the same time it's unsettling after having hundreds of hours in the arcade version where they're the other way around. but then I'm a picky bastard. A bunch of modes have to be unlocked which is bullshit, but then arcade mode is all that matters anyways.
Dreamcast - Not even Zero 3 really. It's the encrappified 'upper' version with scaled up graphics, even less in the way of balance, and laggy control. Supposedly this and the PSX version are based on earlier revisions of the game which have some bugs involving Karin, I haven't tested it myself. Loads the quickest out of any of the homeports and has good although not perfect sound quality (just sounds odd to me somehow).
PSP - due for release in September last time I checked. It's a port of upper which screws it from the start. Then it's on PSP so you'll have to play it on those controls...bwahaha. Probably will look funny on that screen too. Loadtimes? Likely, says the inner pessimist.
GBA - lol. GBA dpad and having to combine buttons for medium level hits makes the control very iffy. It's also based on upper. It also has very very badly done midi renditions of the music. 3 strikes already. Over-enthusiastic announcer which is part of this game's greatness is MIA. Pass.