If you go new, check with the factory often they can sub a King for the Queen in a bedroom. You're right though, not much difference. I've been in the queen version of our current RV and the only difference was the a larger nightstand and of course a lot more room around the bed.
Two Wire Fox Terriers; Sarge & Sully
2007 Winnebago Sightseer 35J
2020 Jeep Gladiator Rubicon