I have both at home. I collect and have too many to carry all on a regular basis. I will snap a photo of the two to show you size difference as soon as I can get to it tonight. I like mine, but more for an outdoor experience i.e. hike or camping vacation rather than edc.
I hope that helps. They are both good knives, the Queen is probably at least 2x more expensive. I can provide great arguments for both knives. I am blessed to own them both. If I was to edc, they would be on my belt in a sheath, both are too big for a comfortable pocket carry.
As I sit and play with them, the Buck, which is older, much older, is nice and smooth, and since I really have not broken in the mountain man, it sticks a little when trying to close the blade. There may need to be a little cleaning of any grit or compound left from finishing, it is possible. However, both are great, they provide a nostalgic sense of pocket knife ownership in my 20's (the 1980's). If I had to give one away and keep one, I would keep the Queen due to the edge retention of the d2 steel. I also prefer bone to wood scales. So, I hope that helps. I tend to buy Queen chestnut bone d2 blade steel anything. I have to be careful and not get to close, or I end up giving into my knife knut primal urges to acquire.