Heidi, I'm not sure how the steward(ess)s are assigned to rooms. Sometimes suites have their own stewards, who don't take care of non-suites. It'll depend on the way that particular cruise line handles things.
In any case, you'll be able to meet and chat with the steward for the other room, even if it's not the same as for your room. S/he'll understand if you have any special requests, etc., even if s/he is not your room steward per se.