OK. Are you looking at the DPMS that R Guns has listed? Or can you provide a link?
Anyway, two other items that I left off my list and everyone else did too:
-The LMT MWS has an easily detachable/replaceable barrel. Undo two bolts, slide the barrel out, slide a new one in, reinstall the bolts with a torque wrench. Best if you use a bolt matched to each barrel. This is a user-serviceable, in-the-field barrel change or replacement feature though. Few if any other ARs have that.
-The LMT upper and rail system is a monolithic forging. Most rail systems are separate pieces that attach to the barrel nut, and the few other monolithic systems (Mega makes one) are to my knowledge billet. I don't know if there's anyone else offering a monolithic forged upper/handguard setup.
Those two features are hard to price since they are essentially unique.
FWIW, I have an LMT SOPMOD stock, and while it's a very nice stock, I would not pay $200+ for one. The VLTOR Emod and Magpul ACS are fairly comparable for less money (though neither is cheap).
On some other points, the LMT barrel is supposedly from Rock Creek barrels (I've read that, not certain) and is going to be a premium barrel. The DPMS barrel, unless otherwise stated, is going to be from an adequate but unexceptional maker like Shaw or Wilson. The DPMS standard 308 barrels (not chrome lined) actually shoot quite well, and my LR-308B is one of the most accurate guns I own. But I wouldn't expect the same durability or reliable accuracy from them, especially in chrome-lined flavor.
LMT makes some of the best AR bolts made by anyone, with modifications to the shape to improve durability. Unless DPMS is sourcing the bolt from LMT or KAC, it's not going to be as good as the LMT bolt. I strongly suspect it's just their ordinary 8620 bolt with some chrome plating, unless there is a specific statement of other improvements and source.