That's pretty much the only difference, as opposed to what the agency will tell you.
However, the agency will not give you a warranty for a US spec model. And if they do agree to service the vehicle, they'll charge atrocious amounts for parts and labor.
In terms of price, a brand new fully optioned 2017 Raptor Screw (only thing missing is the tailgate step which is rather stupid) will run you up AED 315,000, which is approximtely USD 85,670. When I went to inquire (just out of curiosity, as I'm never giving up my 6.2 even though I love the new interior), they were already offering AED 10,000 off the listed price. Lol. It's a buyer's market out here. Wait for a couple of months and they'll be offering the Screws for equivalent US prices.
I bought my brand new fully optioned 2014 Raptor Scab (with the tailgate step, Lol) from Al Tayer with a 5 year / 100,000KM warranty and service contract for AED 255,000, approximately USD 69,430. It was slightly over what fully optioned Scabs went for in the US, but I got the 5 year service contract and agency warranty so I was happy, i.e. worth it.
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To the OP: try Ramy 4x4. I know they're a mostly Wrangler garage like every other off road garage out here, but they're pretty well established, so they may do Raptor specific work. Personally I've not modded much on my Raptor as I'm afraid it'll just give the agency reason to void my warranty in the future. I've just added some auxiliary lights in the front and back, which I did on my own.