You should've compared the same versions of these cubes - 2021 maglev to the V9 maglev. You also should've mentioned that V9 comes in 3 different versions (standard, maglev and ball core) and 2021 in, I think, 2 (standard and maglev)?
I think that the weilong v9 needs adjustable magnets to make it like the best cube ever It will make it heavier, but it doesn't make a difference for me until 100g. And 1000% add some slower lube and tighten it, it is very fast out da box. In the future, I wish that moyu will make a way to adjust the tensions without a screw like gan and make the core magnet strengh adjustable.
Could you guys try adding magnets on the feet of the corner and endge like what moyu did on the v9 but do it on the 2021 and put the ballcore too i wonder what will the performance be
