i didn't try my old tc3 setups but i compared my tc4 setups to them and to start with the setups were softer but now im running gold front/blue rear on rubber and yellow/yellow on foam, i will be trying white/yellow next time....crazy
thats with 4 degree castor blocks, #1 shim to give pro drive (so 3 deg castor) and #3 shim for antisquat on the rear.