Kazuya vs Heihachi difficulty

So, I recently managed to hit Fujin with Kazuya playing kinda casually (work irl and stuff). First Tekken game etc.

My alt is Heihachi and I managed to get him to Battle Ruler in a single day after deciding to play ranked with him. Heihachi felt like I had more options to confuse unprepared opponents, going from stance into grab into his second stance for guard break or his mid uppercut near wall into combo and stuff (Sorry I was never good with move names lol). And warrior instinct basically giving me the round almost all the time.

I dont know, I feel like Kazuya is more difficult than Heihachi but thats just me. Opinions or similar experiences?