I fly both styles and compete in Pattern. For pure precision a Pattern thoroughbred model can't be beat. In my opinion it requires terrific skills to fly Pattern well and score well.......BUT, don't expect one of these thoroughbred models to fly in a 3D mode

For agile, 3D, gyratory and flippy style of flight, the IMAc plane is hard to beat. A purpose built, precision IMAC plane is almost a contadiction in terms. There are very few, if any, on the market with that capability.

So, it depends on what you want to do with your competition time and dollar......