Vbs 66 is very similar than nanogy 98 , really most harder than N1 or BG 66 um. Not really harder than bg 80. But vbs 66 as most control .
Vbs 63 is an particulary string .
Its most harder than bg66 um or N1 but it s most elastic .
Exbolt 63 is very harder and the sweet spot is really smoller