I have never seen it make a bit of difference, I have done them both ways and still get good sounds....
I have noticed that when using a blasted crystal or glass (something not transparent) the logo is visible if placed on the back side of the playing surface where it gets lost on the soundboard.
If you are just using clear glass or crystal and letting the customer pick the playing spots, or for decoration, memorial style calls that wont be hunted with, then the playing surface looks better.