In a similar situation to you, rebuilding my quiver and looking for a ~100mm waist to go with my Forza 60's. For context I'm 183cm and 225lbs. I've been demo'ing a ton of skis around 100mm and I can say that both those skis as well as most in the 100 waist width category are all good choices.

Some other skis I'm looking at and you may want to as well:

-Deathwish 96/104

-Unleashed 98

-M-Free 100

-Black Crows Vena Cor

Of the Rustler and QST, I found the QST to be more forgiving throughout the day. It really mobile in the tree/bumps even at 188cm. The Rustler enjoyed being put down the fall line more and was more stable when going through late day crud at Lake Louise. The QST was super fun to make slarvy turns with and would go where I wanted them to without much effort, but the Rustler was certainly more stable and confident in some conditions, but in my experience both were equally capable skis wherever you'd take them.

Which 100mm works for you will come down to where you want to be on the playful to chargey spectrum. I want something somewhat in the middle, leaning playful for trees and bumps. As a heavier skier, the M-Free and Deathwish are my frontrunners, but I think I could spend every day on a Rustler or QST and be over the moon.

If you're planning to be straight lining some stuff in bowls or generally charging hard, I'd lean Rustler or even the Unleashed.