The Sutra is all too new in the touring scene and has not caused the same stir as the Surly LHT, but as any steel Kona, I think it's a well tought-out bike.
The Rocky Mountain seems capable, but it has short chainstays and a long-ish top tube. The Sutra is just the opposite: 44 chain stays (enough heel clearance) and shorter top tube (more upright position even with drops).