Then do you have a candidate for the hardest… the masochist in me wanna find out.

It is hard but doesn't feel super hard... As
@belllfador said, perhaps the TG3 is harder... and I can't tell because I didn't try it...
Regarding trying/masochism... I said to myself, I have enough of H3, R9, these things are slow, and worse after 2 months you need to reboost and reglue... F... that. So I'm trying hard tensor, the Tronix ZGR... And look, it definitely is faster, it has fantastic control for blocking, it doesn't bottom out (hardness is OK), but, but, it simply doesn't have that spin, or spin/speed ratio... Today I tried with my friend following, I play FH from the BH-side cross-court to his BH and he returns back, only cross-court, and we count to 10. I put all my power to my topspins, and we have long exchanges, and he wins 10:8, and I am totally exhausted ;-)... He blocks all of them, even when I try changing rhytm... So, that much about masochism ;-)... I'll soon try the Andro Chintac, let's see there...