http://husqvarna-te610-610sm.110mb.com/
that gives a good overall picture of these bikes in terms of their strong and weak points. Generally it says the the Husqvarna TE610 is a great dual purpose trail bike - it is reasonably bullet-proof and low maintenance, a great compromise for dirt and road, and quite good for adventure riding with certain mods.
The Husqvarna 610SM is a great general motard bike - it does not have the outright power or light weight for serious racing but is awesome fun on the road, with the grunt to handle longer distances with ease.