Cloak Tuck 3.5 vs ShapeShift 4.0 (both IWB)

Hey guys, I'm having a big dilemma right now with which holster to go with. I currently have the m&p 2.0 compact 3.6". Unlike the Cloak Tuck 3.5, AlienGear doesn't have a ShapeShift 4.0 IWB holster for the m&p 2.0 compact 3.6" however they do make one for the 4" version. I was wondering if it would be worth it for me to go with the ShapeShift 4.0 even though the holster will be for the 4" as both guns are near identical besides the barrel size. The reason I keep leaning towards the ShapeShift is because all the reviews I've seen regarding it and some have even said that it can be slightly smaller than the Cloak Tuck. Since I'm an averagely small guy, every inch would matter.​Thanks ! via /r/CCW http://bit.ly/2G1nRKV