another big one is that things are immune to electric. nothing's immune to dark. that means there are a lot more available pokemon that can shut down a thunderclap 50/50 than a sucker punch one, and they can do it more easily because you don't have to worry about defenses or chip against thunderclap—a tusk at 100% hp doesn't fear sucker punch or thunderclap, while a tusk at 1% hp fears sucker immensely and has to actually play the 50/50 but is still just as confident against thunderclap
I think for this reason HO tends to handle Bolt a bit easier than Gambit. Whereas a well-made balance team can handle Gambit but gets demolished by Weather Ball Bolt.
HO doesn't mind sacrificing a mon and revenge-killing Bolt, which is easier because ground types are immune to thunderclap. On the other hand, balance functions as a cohesive unit and struggles when Bolt always claims at least one kill. And Bolt has more opportunities to set up or force a switch against balance compared to HO.
On the other hand, balance can afford to slot on a dedicated defensive Gambit check like Dozo/ID Skarm, which is absent on HO.
All this reinforces how Bolt and Gambit have fundamental differences in their offensive presence.