Is there an appriciable difference between big name tools?

Can't say much on the tools, my rule is if it can strip out, like Phillips Allen or Torx, it's gotta be snap on or Mac. For wrenches, snap on are a little thin, they'll hurt my hands, but they do fit well!

For tool BOXES, I will NOT run snap on. The drawers are shallower so you can't be as efficient with your space. Deep well have to go in certain drawers to stand on end, the drawer they do fit in is twice as deep as need be, wasting space, etc. Every snap on box I've looked at is like this.

Mac boxes allow me to hold twice as much junk. The drawers are deep enough to store tools on end

I have seen too many guys buy brand new Snap on boxes and a few months later they are sagging and/ or corroding. I don't know if the others will do it, but Matco will let you custom configure one within the parameters of the cabinet. Even put a little "Custom Built for Joe Schmo" plaque on it lol Forget how deep my bottom drawers are 18"? but I can fit a Stinger kit and a 4 ton porta power in side by side vertically and close it.