I’ve been using Breathless in fights in which I don’t recall landing Soulless too much in Vanilla, or matches in which I didn’t feel like Soulless really brought much of anything to the table.
Incidentally, I feel like I’m using Breathless in well over half of my match-ups, even though I always thought, and still think, Soulless is a really fucking good Ultra.
I use U1 against Ken, Ryu, Sagat, Cody, Chun, Blanka, Rose, Dan, Sim, and Gouken, and against everyone else, I’m currently using Breathless.
Now, obviously, this will probably shift one way or the other over time, but for the other matches, I either just feel like Breathless is bringing more to the table, or I feel like there’s something there that I can exploit.
It really does come in handy in a couple of fights (though not so much in a lot of them, at least for me… so far). The Gief fight in particular really benefits from Breathless for a lot of obvious reasons, but one thing I really like is that it completely shuts down EX Green Hand as a mid range tool. With Soulless, there’s some guess work if Gief has 3 bars, so he can FADC the Green Hand, or even if he didn’t, you needed two bars to be able to land Ultra (though you should almost always have those bars to burn in the fight). With Breathless, there’s no guess work. If Gief does EX Green Hand, you get Ultra. No if’s, and’s or but’s about it, and obviously, there’s less chance for execution errors.
I ran some numbers to see exactly what the trade-off is in terms of your combo potential, and here’s what I found:
A combo from Step Kick to Ultra does 520 Damage, 345 stun.
A combo from Step Kick to Fierce Falling Sky does 365 Damage, 465 stun.
Mind you, those combos were done with full Ultra bar, against Gief at full life… so really, when you take into account the fact that you’re not gonna have full Ultra most of the times, and damage scaling based on life bar (which is almost non-existent on full-health Gief, and will affect the Ultra combo, more than the Falling Sky combo, since it does more damage), the damage numbers are a lot closer.
The numbers on Low Strong to Ultra (495 DMG, 270 STN) and Low Strong to Fierce Falling Sky (305, 410) give a little more variance on damage (about one Fierce TT’s worth, which is significant).
Full Breathless does 480 DMG.
So what do all these numbers tell me? Not much, honestly. There are trade-offs, abound… but there were trade-off’s in SF4. A lot of Abel’s, myself included a lot of the time, chose to finish combos with Falling Sky, even when Ultra was available. This mindset leads one to believe that Breathless would be a better option, since your most reliable ways to land Ultra would often go towards a FS combo, anyway.
But, let’s not forget our general Abel bullshit.
Low Fierce-> Ultra (a combo that I landed a lot in Vanilla, off of dumbshit oki mix-ups) does 514, 150. Low Fierce-> Fierce FS does 270, 350. That’s a big difference, and that set-up isn’t match-up dependent at all (outside of not wanting to attempt that too much against Gief).
So yeah… lot’s of numbers… no conclusive decision. I’m gonna toy around today in training mode to see exactly what U2 can punish, to see it’s utility.