I have both just shot them yesterday I bought the Shield because I love the trigger on my M&Pc9 and was hoping the shield trigger would be as good and it is.The CW9 & CM9 (have both) are great but I can't get use to the lone trigger pull or reset so I'll most likely carry the Shield. Everyone has different, say what feels good to them EDC what you shoot and handle best.
SHOOT STRAIGHT BE SAFE