Range? I love doing extreme range testing with my radios, and these DTRs were one of my favorite, because they just kick so much ass. Here in the Mojave Desert, with flat land and relatively few obstructions, I have had a pair of DTR650s out to over 20 miles. I ran out of road before I ran out of range. Of course there were a few deadspots here and there. I had one radio in my car (and had to get out or stick the radio through the sunroof for coverage, and the 2nd radio was on my balcony about 15' up. DFW airport? Coverage of entire terminals, and even between two terminals. Cruise ships will get full ship coverage on darn near any ship out there.
The DTR radios outperform every single handheld radio I own. That said, I haven't compared them to XPR 900 MHz or 900 MHz P25. I don't own any of that gear anymore. Keep in mind that none of these ranges will be typical, and your mileage may vary. But I love mine. Those are my go-to radios for just about everything.