Here’s my take for projectile supers. I seperated them between those that progress a horizontal distance (I.E Shinkuu hadoken), and those that remain stationary (sonic hurricane).
Horizontally moving projectile supers.
Sagat - can Anti-air. Huge damage. Easy to combo into. Lvl 2 cancel follow ups are good. Fast.
Todo - can anti air. Easy to combo into after throw.
Ryu - pretty much like Sagat-lite. Not as good for anti-air, not as much damage(?) I believe.
Mai - extremely fast. Easy to combo into.
Akuma - like ryu-lite. I think startup isn’t as good, nor is damage and the super motion requires a bit more inputs.
Morrigan - anti-air. a bit too slow for combos (?)
Athena - S-groove spam is the only reason I put this here.
Nakoruru - Very fast, but only comboable thru crouching roundhouse?
Sakura - comboable, not that much damage or distance.
Yuri - Fast but is this comboable(?)
Ryo - same as Yuri.
Chang - too slow. Good damage but I’ve only seen it done in a-groove customs and it was inconsistent.
Kyosuke - very slow. Distance garbage
Iori - I’ve only seen people use this in A-groove customs. It’s just too slow for any other purpose.
Dan - crappy distance. doesn’t always hit fully
Stationary projectile supers are those like Chun, Dhalsim, Guile, Benimaru, Joe, Terry, Rock and Geese. Terry’s lvl 3 power geyser is more like 3 stationary projectiles in a sense. Rock and Geese’s raging storm is like a vertical projectile. They’re all pretty decent and there isn’t any that is outright bad. Guile’s stands out as probably the best due to its range and suction properties as well as comboability. The only thing crappy about it is that it does crappy damage when used as anti air (which u shouldn’t be using it for anyways).