Everything rings ;-)
The question is how much is due to the weldment construction, and how much due to the linear rails?
There's a very good reason why lots of the high end machine builders are still using box ways.

Aluminium has better vibration damping than steel. A very general rule is, the more springy something is, the more it rings.
Simple experiment is take a couples bit of steel and aluminium bar, and give them a tap. The steel will ring far more than the aluminium. Even cast iron bar will ring more than aluminium. Which reminds me, only certain grades of iron have self-damping properties.


This is something I've occasionally looked at, as I have a machine idea bubbling away in my mind, but I think to build it properly, would involve a foundry. But then I come back to linear rails acting like springs, and think would a weldment be just as good, with a lot less expense involved?