We just sold our 2010 Fuzion 383, and bought a 2019 Momentum 351M. We've only had it a few weeks, but I'll have to admit that I'm quite impressed with the solidity of the fixtures of the Momentum, compared to the Fuzion. And with the Fuzion you could feel someone walking around in the trailer, not necessarily feel the movement, but you could feel the vibrations underfoot. Not with the Momentum, very solid. Granted it has the auto-level thingy, and we had the JT Strongarms on our Fuzion, but it never felt as planted as the Momentum.
Anyway, just a data point.