VX-SA uses same parts. Equal in quality.
The VX-SA is slightly lighter. Despite that, it seems just-as-stable-as/more-stable-than a TE when people are mashing on it (since the stick is closer to the center than on the TE). Makes it easier to carry.
The home and start buttons are a little prone to accidental hits - you’ll want to open up the stick and remove the button plunger so start doesn’t get hit on accident. Home is just something you’ll have to remember to avoid, but if you are crafty you could modify the button to be less sensitive or more shallow.
If you go into modding your stick with LEDs, plexiglass top plates, or do a dual-mod, know that the TE is more supported for such things since TEs are more common.