I'd say the Vertex 4 will likely be faster, but I would choose Samsung over OCZ for reliability. I have 2 830s and I had a Vertex 4. My Samsung ssds have always been super stable, rock solid. My Vertex was faster but I had a few issues with it, nothing too major though. Lifespan shouldn't be an issue with either, other than where reliability comes in....
The price for the V4 seems really high. I paid $70 shipped for a 120gb a few months ago.
"P.S. Why buy from Newegg...when you can buy from Sneeky!" -LiNKiN