Non-ex legs loses to rush punches generally unless it’s really early, and if you throw EX Legs too early it will trade for 5 damage. EX Shoryu is much better unless it’s a point-blank rush punch because the damage is better and you can combo off of it with EX Tandem. Normal shoryu is still better if you don’t have EX. Seth’s shoryu punishes EX rush punch hard, which you need to do to prevent him from TAPing to make you block up close or EX upper -> cr.lk xx headbutt -> ultra through your sonic booms.
Don’t jumping fierce if he has charge. It’s tempting because he’s crouching, but headbutt beats even j.hk and empty jumps clean, and he can combo into ultra even at max range. Farther away, EX Upper beats jumping away and jumping fierce too, and I think he can combo into ultra if it’s an anti-air upper.
Respect Balrogs great anti-airs, cr.hp and headbutt. You can cross him up on his wakeup or meaty him with cr.lk for free, though. In both these situations he can reversal TAP, which gets him out of the crossup, but then you can just EX shoryu/ultra him after the meaty cr.lk
S.hp beats TAP from far away if he tries to go through your booms with it.
EX Legs does not beat headbutt unless the timing is extra-specific and stupid. Legs only has 2 active frames. Any move that’s invincible during those 2 frames will whiff and probably hit Seth in his recovery.
Don’t play footsies with Balrog up close, just teleport or backdash the fuck away. His cr.hk owns your face in footsies. You can punish it with lp super, though.
Walljump is free out of the corner vs. Balrog. Headstomp usually beats crouching fierce unless he’s a very specific range from the corner.
You can cross rog up with j.hk and it will beat cr.hp, but obviously not auto-corrected headbutt. Walljumps that cross up can basically be free damage/mixups if he tries to crouching fierce you. However, if he does step back -> cr.hp, it will beat your shit, so be warned.
When he’s up close at you in the corner, you’re gonna eat damage. EX Headbutt/overhead/throw mixups can be hard to deal with. Best advice I can give is that it’s better to take the throw than get combo’d into ultra. But if he gives you breathing space, walljump away. I believe j.hk will beat his jump back fierce if he tries to stop you.
If he tries to walk up s.lp you repeatedly, lp/EX SPD his ass.