Thanks. A lot of the systems are interchangable. I found a set of tires I liked so they got uses on both. The bmx pedals are the best compromise (for me) between clipless and flats. The lights are a bit different the commuter/kid carrier gets cheaper units while the mtb has 300 lumens up front for 4am rides every morning. Both got retrofitted with 48t front cranksets as I like having the extra speed if I choose to use it. The front bag on the mtb is for my smart phone and a battery booster that I made allowing 12 hours of gps/mp3 use. The bags have tools and spare tubes. The commuter has a monkey wrench and a few extra spanners on board as well as multitool so I can remove the wheels if need be. The basket is for my kid or stuff. It can carry all sorts of things.

Having no car these are my only transportation so they need to fill their roles well.