^Yeah there's definitely a difference. Kinda like you, I primary played in the Crazylight Boost 2016s and the Harden LS, it's not that the CLB16s were bulky as hell, it's just the LS was more low to the ground, much lighter and I felt faster in the LS tbh. Shoes do make a difference, i say it even helps with performance (if you're playing in lighter shoes, you gain a slight gain in your first step and feel faster). Of course it won't help your jump shot or raise your bball IQ but it'll help in several other areas.