The first time I heard about vortex and their "warranty" it sounded perfect, until I really thought about it, I seem to remember them claiming it didn't matter how or why you broke it, they would fix or replace it, it seemed like the emphasis was on replace.
And then you read all these stories about guys over torquing the rings crushing the tubes, purposely driving over them or swinging them against a wall and sending it back and getting a brand new scope in return, that's not a warranty, that's a built in replacement program and the cost of that program has to come from somewhere, where else besides quality or price point would that difference come from.
That being said, when i was in the market for a hunting monocular vortex was the only company that offered the price and features i was looking for and my solo mono 8x36 has been great, going 3 or 4 years now with no problems, it would be nice if they made it easier to attach butler creek caps to both ends but I would buy one again if I lost this one.
I can't comment on korths warranty service as I've never needed it, I've always heard it is good and fair but never had to utilize it, I've contacted them once inquiring about a reticle and turret change and they answered right away and explained everything, YMMV.
I'll admit I don't shoot my guns as often as the average guy here does, I'm probably in the bottom 5-10%, that being said I hunt for a few weeks every year and makes 5-8 range trips/year, I've dropped my rifles a few times, banged them against a truck cab or tree or forgotten a cap open and let the bell end fill with snow once(luckily no shot presented lol) and not once has any of my leupolds failed me so I'm happy with them.
Vortex is completely transferable, like leupold. The difference is that vortex actually gives a crap about the Canadian market. Leupold makes us deal with Koth who as noted above sucks mega balls to deal with.