What is the difference between Excel KTP and laser genesis for redness?

I've had 3 KTP treatments for redness and love the results, I want another one but laser genesis is offered as a cost effective maintenance laser to it. I am wondering since it is half the price, is it also half the effectiveness? If so, I want another KTP since I know it's reliably fixing this redness that's made me insecure for YEARS. Also, I'm getting a PicoSure focus treatment soon for pores/collagen, is it possible to do one of these other lasers in the same appointment? Thanks.