I thought the benefit of the OWC SSDs is that the TRIM support was handled by the controller. Is that the same with your SSD or did you enable TRIM in your machine?
This is also marketing and misinformation. If you looked at their site, where they say that, it isn't something from OWC itself, but an arbitrary blog post from 2010.
TRIM is a just a command. What they mean to say is their Sandforce-based controllers have some sort of garbage collection... but
every modern SSD has good garbage collection algorithms, and I personally think Samsung's are far superior without being as aggressive as the Sandforce. In either case, I strongly recommend enabling TRIM regardless of the onboard algorithms or controller.
I've pretty much used every SSD from every manufacturer since the original Vertex and G.Skill Phoenix Pros. There is no advantage to paying extra for OWC-branded 2.5" drives, especially when they are just a commodity seller using off-the-shelf components (likely Samsung NAND and the Sandforce controller). Of course, if you need special form factors, they're your only option.