Mexican made Fender
Hardware and electronics are huge differences between the two (especially hardware), but you said to talk about things aside from those.
Here is my take on the other main differences between U.S.A. Standards and Mexico Standards:
- The U.S.A. models have at least $150's worth of fret work, nut work, and setup work over the MIMs. That is, in order to get a MIM playing as well as a USA, you're gonna have to redress the frets, get a new nut (or have your stock nut refined), and set the thing up.
- The U.S.A. models have better quality finish work.
- The U.S.A. models have a classier and more refined looking truss rod access point.
- The U.S.A. models are held to tighter inspection criteria over all, i.e. more flaws are tolerated on MIMs without them being pulled away as seconds/trash/whatever they do with them. You'll see them from time to time with weird finish flaws (metallic swirls, thick spots, cracks), weird wood sculpting flaws (dips and lumps), scrappier looking edges on things (e.g. the nut), etc. It's not that Mexican workers are inept. It's just that the inspection criteria are more lax on the lower end stuff. MIMs can make it to stores with flaws that would have easily had a U.S.A. guitar rejected.
Combine these things with the fact that you might want to put $200 to $300 in hardware and pickups into a MIM Standard Tele in order to make it feel and act like a good guitar, and you really aren't coming out that far ahead by getting a MIM. IME (which is quite a lot souping up MIMs, MIJs, and Squiers), if you buy new, then improve, you end up with an $800 guitar, possibly more, before it behaves like a really good quality instrument...and even then, it still holds traces of its low-budget roots. You'd probably do better by getting a used MIA for $600 or $700, and just replacing the pickups (if you even want to), which can be largely paid for by selling off the stock ones. If you are going to fix up an MIM, try to get a used one instead of a new one. Personally, I only bother souping up lower end guitars any more if the model in question has some really cool and unique features, or if I happen to get a killer deal on a guitar that has some character to it.