Here is the nitty gritty, well at least from our side of things. And for this post, I write this from the first person, as I am the one with the time spent riding this particular setup.
In years past, the Togwotee Bib and the FreeRide Pant have been the big sellers for us. Some people like pants and some people like Bibs. This has been a 100% preferential debate for years now. But up until last year (2013) both the Togwotee and the FreeRide were basically the same setup, one just had the chest and suspenders. In 2013 the Togwotee got re-designed with the application of Gore-Tex Pro, which is a three layer system that is 25% more breathable than that of the standard Gore-Tex used in the rest of the Klim lineup. So in essence this bib was now the top dog of the lineup being the most breathable, most durable gore-tex motor sport specific shell ever designed. The free ride pant also got some changes in 2013 with a new color configuration, and a slightly different cut, but still used the traditional gore-tex for Klim.
I personally got to ride the stealth setup, both jacket and pant for a little over two weeks last year, and it was pretty impressive in my opinion. I think if people are telling you it stretches, don't expect it to be like your four way stretch swim trunks. It does stretch - in essence, but I prefer to tell people it is extra flexible. You can't grab onto it and give it a swift pull and make it stretch any sort of distance that will be noticeable to the eye, but you can feel the fabric give and flex in the direction you are pulling. The one awesome feature that the stealth bib has that no other Klim piece has, is the ability to zip off the chest and suspenders, and wear it as a pant. The best part, of this, which really needs to be evaluated on the freeRide pant, is that it has belt loops. Still baffles us here, that none of the Klim pants have belt loops. The stealth bib is also a bit more lightweight than that of the Togwotee bib. One other noticeable thing that I was able to feel was that the stealth bibs fit more slim than the togwotee. The legs were a better fit for me than my togwotee and freeride pants.
But truth be told, so far this year, those that buy the stealth are taking a chance, banking on the fact that Klim is a reputable company producing reputable products, and if they designed something better than anything else in their lineup in previous years, it is probably worth the extra money. I don't think you will find anybody out there that has ridden them in the general public that can tell you that your money is well spent yet. Maybe in a couple months, but not yet. I will be riding the stealth pant this year for a couple reasons. First, because of the belt loops, and second because of the fit. I am 6'2" and 190, and I really enjoyed the slimmer fit, and REALLY loved having a belt.
Do those things make it worth the extra $150.00 to you? That is something that each and every person will have to answer for themselves.