There is no need for or benefit from a FMIC on smaller turbos.
I personally went with the TurboXS TMIC because I wanted a proven, quality product with stock-ish boost-response and better than OEM heat dissipation. The Spearco TMIC is the largest available I believe, though I didn't think I would benefit from it on my setup. When I get to the place where I'm bolting in a built motor and a GT3788, obviously I will be doing the work to get a FMIC in place. For now though, a FMIC would do nothing to benefit my Evo III 16G setup.