www.par2pro.com
SkyTrak: http://www.par2pro.com/shop/product_i...
GC2: https://www.par2pro.com/shop/product_...
*Please note that this is only for GENERAL comparison - while we were able to get both to read at the same time, the ball placement and analyzing area was not ideal - please see SkyTrak Then GC2 Video for proper readings*