He will get the same 2-3 inches. My friend james has 2 in his 20 gallon tank. They to were labeled as Red Dwarf Honey Gouramis. My LFS manager said that they were NOT dyed but they were crossbread.
She/He is REALLY red... are you sure he/she isn't dyed?
They are technically the same fish... just different colors.
All colisa chuna (honey gourami) are like the same fish just different color varieties.
All colisa lalia (dwarf gourami) are the same fish jsut different color varieties.
Just like blue gourami, gold gourami, and opalline gourami are the same fish.... just different color varieties.
They tricked you! Sneaky dye people. Be sure you don't buy those again. When I saw them they didn't look dyed but it's just not as obvious as a bright pink line down a fish's backside.