Honestly, I don't think you'll notice a difference between either. both are fast and reliable. Between the two I'd go with the Samsung just because it's newer design. But in actuality, I went with Vertex 4 because I wanted to see how the new controller was. Supposedly it's in the same class as the Samsung and the Crucial.
Samsung SSD are very reliable from what I hear, I would definitely choose Samsung of the two.
I use a Corsair GS and very happy with it mine, it's fast and reliable, I'd recommend one for sure. SSD don't die as easily as people make it sound like from my usage of them; so your should not have to worry about life span alot and they will both be pretty fast.
I have an 128GB M4 and it performs great, but last night it kinda failed. I bought it in August 2011. Got a response from Crucial that it might be a garbage collection issue and that it needs to sit in an idle state for 8-24 hours to possible correct the issue.
I'd go with the 830 just based on this failure. Either drive is probably fine though. I haven't read of anything like this on the 830 (although I hadn't heard of this problem on an M4 before either)