Re: Breaking strings on Fender guitars
Tuning is easy. Both guitars have standard bridges with vintage saddles (same type of saddles)
Those are both string brands that commonly get bashed for breaking.
You weren't very informative in describing what bridges you have, but assuming a "standard" Tele and a "standard" Strat the difference to a Les Paul is that these Fenders dives down the strings into the body at a 90 degrees angle, and there there is a lot more string length between the saddle and the end of the string.
I would try a different string brand and I would investigate whether you need to pre-stretch the strings more between saddle and ball end.
Does the guitar take a long time to get into stable tuning after you change strings?
Tuning is easy. Both guitars have standard bridges with vintage saddles (same type of saddles)