I’m no expert in this area but I just meant some yoyos are just specifically designed for 3a or 5a as opposed to 1a. When I think of the best 1a yoyos I think extreme rim weight. I don’t think rim weight is as important for 5a yoyos, average weight of 65-67g is more important than in 1a, maybe a rounded multi-step V-shape? I’m pretty sure there’s more that goes into it but like I said I’m no expert.
I didn’t really mean 5a yoyos are different than 1a yoyos, I just think designs can be made to be more 5a-oriented.