Stephen, we have this Rigid shop vac that we recently purchased for hot crafts and the kitchen, it’s rated at 144 CFM, actually higher than the Festool at 140 CFM. It’s also only $125.
The only two things that make me consider that the Festool may be better are noise and static pressure.
The Festool states it can pull 96" of static water column, the rigid doesn’t specify, but we have one, and could rig up a quick test to measure it.
And for noise, neither publish noise levels, which is unfortunate.