(Edit: After reading this I realize it sounds kinda condescending. Please don't interpret it that way, I'm only really critical because I love marching band so much.)
I love listening to marching bands. I've played most of those songs at some point in some band, so it was interesting listening to other people's versions. Here are some completely dismissable opinions:
Your band was nice. Technically proficient. Unfortunately I don't know that "nice" is what marching bands should shoot for (you guys seemed to be a little bored, although it sounded quite good). This could have been the position of the recording equipment, though (and I know that this wasn't a gametime atmosphere, which can easily affect your attitude as a band).
Some of the other recordings:
-Frankenstein (the one you mentioned) - not really impressed. It was also nice, technically, but it was so
straight. It needs to be a little more swing-y.
-Bohemian Rhapsody - Lol. This was one of the bad ones. I've performed this song a couple times in halftime shows and whatnot, and their version sounded like a tribute to an opera.
-Crazy Train - Also lol. This time it sounded like a jazz combo/concert band. How do you mess up Crazy Train? It's a classic stands tune.
-Hey Jude - Hey bad. I might have just been offended because we just performed a show with Hey Jude in it, but I couldn't listen past the first intro of the low brass, they were killer out of tune.
(I promise they get better, those are just some of my favorite marching tunes and they were pretty rough.)
-Carry On My Wayward Son - Not too shabby, it was styled well but trumpets had problems in the high register (it gets up there for them) and it was a little slow.
-Call Me Al - This is one of if not my absolute favorite stands tune (it's a Gator Band standard). They did a decent job but it's hard hearing anything different than my own band.
-Final Countdown - This one really wow-ed me. They took a killer song and made it what a stands tune should be.
(If you're interested, here's our band playing "Call Me Al-" it's such a party song, and fantastic to watch in the stands or in basketball games:
http://www.youtube.com/watch?v=yOEHiNNGXIE
And here's a pep band playing it at a basketball game - this is why it's one of my favorite songs to play:
http://www.youtube.com/watch?v=ODEgC5RGRnk)
All in all, you guys were definitely one of the best bands. I'd probably give you guys a superior on musicality, if I were a judge.