the XBLKs are the better OC'ers...notice the timings on the one you got are 2-3-2-5, that means they are more than likely samsung TCCC chips...they aren't quite so bad that they are valueRAM but TCCDs are the best chips you can get pretty much, aside from BH-5's which require a lot more juice to thoroughly open them up.
If you have time and REALLY want to OC, I'd suggest you get the XBLKs
That OCZ RAM you listed is valueRAM, looser timings and definitely won't OC as much.
Patriot is a well known name brand, but some companies are just bigger, but trust me they're good RAM.