I've never tried the Grease Erasure stuff, but used to use Extreme Clean all the time on trashed out rentals.
When I ran out of it, I went to reorder some and found they not only increased the price, but DROPPED the size of the container. WTF?
So I ordered some stuff called "ZING" from Steambrite, since they said it was comparable to Extreme Clean. When the shipment arrived I compared the Zing to the little bit of Extreme Clean I had left, and they looked and smelled almost identical. When I put the Zing to the test, it took care of the nasty rentals just as easily. The price was substantially cheaper, plus the FREE shipping on case orders didn't hurt, either.
BTW....Plus the Zing stuff came filled all the way to the top. When they say 7 pounds, they MEAN 7 pounds. When I ordered Extreme Clean there was a lot of extra room in that jug.