Is there a big difference between the speed 3’s and 2’s?
Going from memory from when I looked at the spec we were given the 3s are 2mm wider in the base, redid the plate with a S curve plate (forgot what they are calling it though), lighter, will come in a 2E (although we haven’t gotten our 2E’s yet), it’s a little lighter and they tweaked the midsole to make it more responsive.
They may have made other changes but I don’t recall if or what they were.
Hope that helps