I am going to buy a 2015 Coachmen 21RS. Any comments on getting a Ford or Chev. The only difference that I can find on the Coachmen description is that the gross weight for the Chev is 14,200 lbs and ...
The Chevy is a little bit longer because the doghouse is smaller.
I'm surprised you can find a rig with a Chevy chassis, mainly because most RV upfitters have moved to Ford E-350/E-450s.
Other than that, both platforms will serve you well. Ford has the edge on dealers and service, but other than that, it is six of one/half a dozen of the other.