While this may be true in your experience, a new Mexi-Fender is still going to set you back around $300 more than a new SX, depending on the model.
That $300 is a substantial chunk of change to some people, and is probably a big factor in making purchasing decisions that don't revolve around the name on a headstock.
I've no doubt that the SX basses serve an important niche for people who want cheap instruments for whatever reason. My point is that there is more different than just a name on the headstock.
I realize that SX has a rather rabid fan base on here, so that is my last contribution to this thread.

