If you look at them, the XLT (and also the METRO, essentially a 210XLT combo) has one set of slot/ports across the bottom, the XST has those vents above and below the drivers. I don't know the difference internally, but the Eden 210XST seems to be THE thing for a one-box/210 rig, before you step off into the BagEnds, Epifanis, etc. But I can't imagine either being mids/high shy.
J o e y