Thanks for the clarification. That version of st.fierce can also be used as an anti-air, especially against jump-in attacks such as Honda’s j.forward. Personally, I prefer to use the st.jab, since it has better priority, a reduced extention on the blue-box, and the entire arm is invincible. It’s sort of a personal preference kind of thing, some Guiles will use it every so often, other Guiles NEVER use it, just depends on how you play and what you’re comfortable with.
St.roundhouse is pretty useless. Based on hit box overlays, it MIGHT be used as an anti-air, but it’s far too low, and comes out at a weird angle to be properly used against close jump ins. At any range where an opponent is jumping directly over me, I prefer to use st.forward, which I also realize is a strange anti air that many Guiles don’t use, but I love it.
But I like using st.roundhouse to kill off characters. Like if they’re stunned, and only have a few pixels of health left, I either do a j.roundhouse x st.roundhouse, or just walk up and do st.roundhouse. It looks pretty funny, because nobody ever sees Guile using it.