Funny how so many of the copy-cat designs are from the 2008 contest though. The grand prize, 2nd, 3rd, and 4th place tanks have numerous emulators in the top 27.
A lot of aquascapes do get reused - one plant may be switched out for another, rocks and driftwood may get moved to a slightly different position, or the entire aquascape could be reversed simply by flipping it horizontally on Photoshop, etc. And yeah, there are copycats too.
I like some of the rock work, but they are being critical, and the comments about the black edge rim in one of the tank.......like everyone should have ADA seamed tanks...is a bit snooty. Judging is not easy,however............some of the rock work is well done.
Someone pointed this out to me some time ago, the thing about the ADA competition is that it isn't an aquascaping competition - it's a ADA competition. They'll be critical about things that are more superficial like the rim showing, equipment left in the tank, cloudy water, photography/editing skills, etc.