I see where you're coming from......for me, this bike is going to be a mountain twisties road commuter sprinkled with some small town riding. It likely won't see the track as I'm planning on building a track-specific fairing'd bike next. I think I'll run the slip-on first and make the decision from there....Congrats, you'll be really happy with the bike.
If you like loud you may want to go with decat then, because my Wings pipe without a db killer still isn't overly loud. My Street Triple with an M4 shorty was much louder, too much for me. And as you see in the dyno graphs you do gain some nice bottom end with the decat. If you mostly ride on the street it could be a good option.
I hope to do more track days this year, and I already feel like the powerband ends early and forces frequent shifting vs. the triples I'm used to, so I didn't want to lose any power on top. I'm also hoping to hit Laguna Seca once COVID restrictions ease up, and the noise levels there are so restrictive I'll have to at a minimum put the DB killer back in, and probably bring the stock exhaust as a backup, so a decat would definitely get me black flagged.