The only real way to know is to put it on a scale.
For a general idea. Being most rvs are made from all the same fine quality stuff, they basically weigh about the same, at least in the same dry wt ballpark. Just do your own calculations for specific water tank size and only you know how much stuff you bring along with you to eat up your payload. Don't forget to add the weight of optional EQ.
click the model , scroll down to view weights-payloadsmy 2351 model rolls all loaded for a trip and I really load it up with stuff at approx. 12,200-12,500 most of the time. That's about 2000 lb over the dry wt.