The big thing for me, just by my experiences with my friend’s Honda, there are some things that stand out to me.
The first of which is the damage output vs each other. It’s actually even keel. Both of them get pretty good damage off of their jabs/shorts, both characters get half life on their combos including super. There is a contrast I found that actually even with that keeps the output even. Yun can get the damage in a lot more situations than Honda can, but because of Yun’s health compared to Honda’s health, Honda’s combos hurt Yun more than the other way around. Thus, I feel like it is even in that department.
There are also some Yun only things that he can’t get away with vs. Honda. For example, say you want a quick in, and you are looking for a good opening for a lunge punch. It’s best to do this with a regular lunge, but even then if you mistime the distance and have to FADC back out to plan your next approach, Honda can punish the back dash with a reversal EX Headbutt. Also, if he has meter, even though this is pretty obvious to aware Yun players, you can never EX lunge in if he is downbacking. He will at least EX headbutt you if not U1.
The significance of Honda’s hitbox as I said in the previous post and as you mentioned cause you to have to time your dives to hit deeper. When he has no meter it’s pretty okay because you have some room for error with the diving, and the worst you could take is a throw tech since he can’t force you to block a 3 framer like Boxer/Chun/Dictator for a bad dive. When he has meter though, EX Headbutt combined with Yun’s health makes your room for error pretty small. However, jumping back or neutral jumping can be used if you believe your dive is badly spaced to bait the EX Headbutt then you can punish accordingly.
Mid range wise, both of them have good buttons that annoy the other. I’m not as rehearsed as to what beats what, because my friend is a more offensive Honda and thus his style doesn’t focus on the mid range.
And just to really put a lot of emphasis on EX Headbutt and the siginificance of it in this matchup, I generally see Yun as an offensive character. Generally, vs. any offensive character, EX Headbutt is a nightmare. Most offensive characters tend to have lower health, and that one move takes a good bit of that health. Also, on a hit, pushes you to the other side of the screen, and on block, it leaves Honda with space to get some counters in to the approaches that Yun has. So as a Yun player, you want to make this move whiff because you can in most cases punish a whiffed EX Headbutt with a lunge punch at the very least.
I guess to sum it all up, the more correct reads Honda makes(neutral jump/jump back hp, EX headbutt, bait something into full combo), the more likely it is for him to just sit there due to the life lead. Generally, Honda wants space in this matchup because the more space Honda has, the more approaches Honda can deal with from Yun. The more Yun can force Honda into bad reads and such, then turning the opportunity into a one touch kill, he will have a better time. Alternatively, if Yun has the life lead, he can also choose to back off if he sees that Honda has meter, making Honda have to come to him. This is a good strategy if you have super, and Honda has any meter himself with Yun holding the lifelead. In this situation, Honda cannot jump at all, meaning he has to walk forward. If he as to walk forward, he loses his back charge, thus taking away headbutt. This can be countered if the Honda player has good awareness in the neutral game, but if you are forcing him to play footsies with you, you can get him to do a laggy normal to dive on, giving you an opportunity to end the round.
That’s just from my experience with playing the matchup. Generally, we need a few inputs and such to really discuss a character matchup I feel because not every player plays the same. This is why I generally ask for others’ opinions too before chiming in with mine. That way these things could be tested and such and we can combine different approaches to solve the best way to play the matchup. At least that’s how I think now ha.