Glass or MDF Shelves

The glass does look better to me but maybe I put my Acoustic Signature on top of butcher block or something else

That’s a turntable. Turntables are special. In more ways than one. What they all love more than anything is mass. A close second would be stiffness. A close third, damping. The more, the better.

With a turntable, you will be well served to give serious thought to a dedicated turntable rack. These flimsy racks like VTI that are okay for everything else are just way too rickety for a turntable. Might work, depending on your particular location situation. Or might not. You pays your money and you takes your chances....

MDF isn't great but is very benign in terms of not contributing anything particularly objectionable. Glass on the other hand isn't great either but is very hard and not very well damped at least if it is plate or tempered as opposed to laminated. With both (and with everything) how thick and what shape matters. But hardly anyone ever gives any thought to that. Instead almost always these things are made about as thick as you're talking, without ever doing any listening tests, simply because it looks about right for a shelf and they know that no matter what people say in reality they buy based on looks.

So which one looks better?