I've ridden both of those bikes as well.
Tom Bombadil summed the bikes' personalities well. I personally prefered the feeling of my Marin San Anselmo to my boyfriend's Trek - and I was pretty fast on that too - but maybe I was just used to it more since I was riding it a lot. I have a soft spot for San Anselmo in my heart since it was my first "real bike", and the first I put any significant mileage on, discovered commuting and touring -- but you can't really go wrong with either.
Helpful, I know.
