the last comparison reminds me of where in world 3 of SMB3, the music sounds like from zelda. I can't remember specifically because it's been a long time.
FF does have a few recurring themes (Battle of the Big Bridge). DQ normally has amazing but anemic soundtracks that are padded down by songs from earlier games.
One thing that's cool is that the orchestra versions of the FF music has some micro-shoutouts to DQ's. For instance, the main theme of Final Fantasy actually has the (daaa) da-da-da-da da daaa from the Dragon Quest theme in the backgrround, and FF4's Theme of Love, in the 20020220 recording at least (I don't know about the others) actually has the opening notes of DQ5's theme of love in the background at about 3:45.
And DQ4's soundtrack, though amazing, rips off two well known Christmas jingles in its town and Balloon themes. WTF?
also... dayum, that guy who has his tune hidden on a shitload of games? hahahah he PWNS. EVERYBODY. i mean, how many did know about this? and how many have found ALL? This guy played us all ... and played us good.
I love VGM, thanks for the Crysis soundtrack btw, and am often creating sounds that are probably inspired from the games I play or have played. Just wanted to let people know that if you head over to http://www.splosionman.com/ and go to the free stuff they have the music available for download.