Suspended vs. non-suspended turntables

My main system currently includes a Project Perspective with Grado Sonata cartridge, Conrad Johnson EV-1 phonostage, Conrad Johnson Premier 17LS preamp, McCormack DNA 500 amp, and Thiel CS6 speakers. I have noticed that this turntable sounds a bit shy in the bass despite adjustment of VTA and downforce. As a result, I did a quick experiment and swapped out the Perspective for a Project Debut with a Denon 110 cartridge, a rig that is much less expensive than my main turntable set up. To my surprise, the sound is much fuller with this inexpensive turntable, although it is a bit brighter and has more surface noise. Do you think this may be due to the Perspective being a suspended table and the Debut not? Any other thoughts on why I notice this tonal difference?