Did you shoot the Carbon Element? or the Matrix?
I'm sure the vibes and noise you hear is coming from the FLX guard and the string Stop. BowTech has not hit the right combo with a string stop yet IMO.
Local BowTech dealer here had a standing order with me last year. Every Destroyer he got in I put a MeanV on it and Flx guard dampeners. It makes a big difference, and he noticed it enough on the 1st one that he wanted all the others done the same.
I think he sold about 70 Destroyers last year.
I'm sure this year I'll be doing the same for the Invasion & the Destroyers.
As far as the speed of the Invasion compared to the CRX? I have done several side by side tests in the last few years and when you get the draws the same, the poundage the same, & shoot the same arrow through the same graph, the Hoyts almost always shoot faster than their IBO indicates and the BowTechs fail to reach their top IBO projections.
Case in point The Alphamax 35 out shot the Captain by 7fps. The Captain did have slightly less vibe
The last thing I look at when I buy a bow is speed. Most any bow is plenty fast and the difference between a 323 fps bow and a 340 fps bow is not even worth talking about.
Many Archer's would be much better off shopping for Smooth, Quiet, Forgiving, and easy to shoot bows instead of just looking at IBO's which for the most part are highly inflated