I have a CBOB and, as of recently, a Marksman. The Marksman is a PM7 without the forward slide serrations. I agree with Walter about that.
I just shot the Marksman in a comparison to my Kimber Team Match II, the TMII had ever so slightly smaller groups.
The sights on both guns are identical. Both have match barrels, and I took pains to make the circumstances identical.
The DW is prettier, but lacks front grip strap checkering. It's highly polished whereas the Kimber is bead blast finished. The bead blasted finish is much easier to maintain.
Both came with billboard grips which I hate, I'll replace the DW grips eventually with cocobolo full checkered grips. The DW grips are nice looking but I don't like advertising on my grips, which is why I changed out the Kimber's grips.
The DW has a single RH sided safety, where the Kimber came with an ambi, which I swapped out for a RH type.
I have no idea what I'll buy next, I've bought all my dream guns. Hmm, maybe just a few more.