Traded my 2007 Trek SLR 1500 for my friend's 2015 Marin Argenta Comp

So, my friend asked me to trade my Trek for his Marin and I agreed. The newer Marin might be easier to sell, but honestly I think the Trek was a better bike even for its age. The Trek had a 27 speed 3x9 mixed 105 and Ultegra components while the Marin has a more modern yet lower Sora groupset....