Most people will always compare THIS cruise to their FIRST cruise, and 9 of 10 the first WAS the best ..... if his only cruising has been Dream/Fant' then that's his "standard" and everything else is measured against (right or wrong)
DS did Magic/Wonder many times as a kid ... and later Magic in the Med for Honeymoon. Later sailed DREAM and was quite disappointed ... booked Magic for next cruise while on DREAM ....
Expect it ... try to work around it .... human nature ....
EVENTUALLY, some folks cruise on a lot of different ships/lines and have a broader base for comparison ... but that's not where you appear to be ....