I had a bad past experience with torque, and unity is as much appealing to me now as torque was back them, hence my skepticism.
That doesn't imply that the engine is a 'TORQUE', but the pattern repeats itself sometimes, so i'll be in the safe side this time... meaning: i KNOW for sure that i can make a game in A7 and sell it without further problems, and Unity only looks good and doesn't mention fees from released titles anywere.
A7 is very clear: Extra edition, shows logo, Pro edition, don't need but pay USD 1000.
If Unity has a page explaining prices for commercial games that i didn't saw, that thing is REALLY FREE for commercial use, wich is really weird!
Unless they can do something like charging you after you start having profits after some juridical hole in the END USER LICENSE AGREEMENT, Unity might be a breaktrought in game development policy.