I know the question was Redline or Blackline however ditto on the last post.
http://www.newegg.com/Pro...x?Item=N82E16820226124
Memory like CPUs is a crap shoot when it comes to overclocking you might get lucky with any of the above. With Mushkin typically the Redlines are there top binned modules if that helps with your decision but the ridgebacks are known for value and overclock ability a bang for the buck sort of thing. You should keep in mind though overclocking the memory produces little gain in noticeable/palpable performance sure your bandwidth might increase but nothing will replace overclocking the CPU or GPU in terms of realizing big gains. Most will clock the heck out of the later and keep memory at 1600-2000 speeds with tightest timings and a 1t command rate, where arguably you'll  see the best performance. Those rigdebacks start out better because of the low latency rating at 1t. Mushkin or not the lower the case at a given speed the better the module.
Good Luck!