they are both 130 BCD but ISO taper , the type 2 can fit a smaller big ring , and it looks lighter too if that concerns you ,The type 1 pictured (not mine ) has an incorrect TA large ring by the looks of it. I think the type 2 crank came with the Dia Compe brakeset group and the Type 1 came with the Modolo made brakeset group , there was a later group even that i have never spotted online anywhere