· Joined Jan 26, 2014. 288 Posts. #8 · Jan 4, 2015. I would stay with the TL12 size that has servered you so well. The TL12 is the TL250 is the TL150. The 12 has more power and some refinements (dual aux circuits too I thunk), the 250 added high flow with less hp, and the TL150 was the original.