which harness style, latch or camlock

Considering that you have to replace your belts every 2 years (if this is for a race car), I don't think they are worth it. I have had both...they both take about the same amount of time to buckle up, and they both come undone with one motion (lift latch, or turn the cam lock). The latch harnesses are ~ 1/2 the price...easy decision for me.