I'm a bit biased as I have the SoT setup on the front of my car. Both Mike and Shaun are awesome to deal with. Shaun for me has been a wealth of knowledge, responds quickly and helpfully to all of my little and sometimes ridiculous questions. Truly a standup human bean.
The coilover mount on the lower arm allows for more travel and a longer shock assembly which can help. There is a lot of theory and discussion as to why that I don't have in front of me.
JRI and Bilstein are both a quality shock. I've also always been more of a bilstein fan, from the days of me having classic BMWs. I like the valving thats in mine as a street car. Its stiff but not obnoxious or rough. The car is well planted.
I'm not 100% sure on the reasoning for the offset upper arms. I know SoT's comes with the template and instructions for the Arning drop. I haven't looked THAT closely at the MMI setup.
Both good choices.
My only regret? That I didn't get SoT's 3 link rear at the same time. haha