Car free since 1995
Join Date: Sep 2006
Bikes: Birdy Yellow, Birdy Monocoque
I've used both. Those are accurate words! If you are sticking to glass free areas that are also free of thorns and other puncturing pests, I'd go with the Racers. Otherwise, stick with the regular Marathons. They are tough, last long, and very puncture resistant (but they are a bit thinner than the Racers).
If you want a nice fat tire that is soft and heavy, the Big Apple is the tire for you. It's a few steps beyond the Marathon. Just make sure it fits in your frame.