I have one Queen MM. Fit and finish is, on the whole, very good. Mine does have a little vertical blade play, but the lock-up is still strong. Some one ground just a wee bit too much off the tang. I know others who have gotten perfect ones and others who have had horrible luck.
I've never owned a 110. They have absolutely no appeal to me and never have. I do own other Bucks. Buck does seem to be more consistent with quality, but you can get bad ones. I know, because I have.
If you're buying sight unseen, you're taking a chance on getting a bad one. Both companies have good reputations, so you should be able to get a good one eventually.
My favorite is obviously the Queen. Aesthetically, I find it far more appealing. Functionally, it suits me better too. The 110 is just too heavy and the handle isn't as comfortable. Personally, I have no trouble carrying the Queen in a pants pocket; front or back. YMMV.
Leo