im having the 2010 TSX, and it is possible to change my 2010 TSX's grill to the 2012 TSX'S grill? are they the same size?

They are not the same size. To use the 2012 grille, you would also need the 2012 bumper.

u like the 12 grille better? how come? i like the 2010 grill better...and i have a 2012

Noah - it looks like you just found someone to swap with. The price you would have paid for an new grill you might be able to get the bumper sprayed to match.

yeah except im not swapping....lol. gonna keep mine as lightly modded as possible, so the value is retained best.