In respect to cost I found the MTS less money than the GS similarly equipped, though I think you could make an argument that the GS's panniers are worth more money
I was quoted $22K OTD on a loaded Rallye Edition (that's how they come anyway), ABS, ESA, bags, etc. I got the Multi for a couple grand less than that OTD. Had I paid list, the difference in price would not have been worth arguing over, perhaps amounting to a couple of hundred busks in favor of the Multi. The number probably look better for a standard GS, but they are both of a class in my opinion. Am I missing something?