Viking vs. Dave Platt crossover

I'm trying to decide between the Viking and Dave Platt crossover for my 2018 Roadster. The Dave Platt pipe is certainly more attractive, as it's made from stainless steel, but I'm more interested in performance and proper fitment. Any suggestions?
I went with a DP and my only complaint as it doesn’t split evenly so you get a slight salt buildup on the left hand pipe not too much but I’m going to change it
 
Did you use tune ecu or PCV?