I know this is a bit of an odd comparison, but I'd be curious to hear which bike folks think would be better for commuting ~30 miles one way a couple of times per week on a mix of roads and MUPs with an occasional hard-packed fire road for about 3-4 miles. But I'd probably run slicks (maybe 28 or 32 mm). I'd be carrying a rack and usually have one pannier bag with a laptop and a change of clothes (~10-15 lbs).
I suspect that the JTS would be faster and the Casseroll would be more comfortable. Salsa is cheaper by $300-500 or so but JTS has better components and looks better. They'd probably both be lousy but passable in the dirt with ~28mm road tires (Marathon Supreme or similar). Would the JTS have a more aggressive riding position?
Any thoughts? I have a Six13 right now and I'd probably just commute on that except that it can't take wider tires or a rack.