Hey guys, I was wondering if you turbo gurus out there could could tell me what the difference is between these 2 turbos. What should I use on my truck with my current combo? I rarely tow and when I do it's only 5 or 6000 lbs during the winter. Also what exhaust housing, 12 or 14 cm2? Cash is a bit of a factor. The least amount of lag the better. Thanks