is it just mine or do strings on stratocasters break more than on other guitars like i also have an epiphone sg and the strings dont break nearly as often on it
What strings are you using?
Are you using the same strings for both guitars?
Strats are longer scale so tighter for the same tuning. Strats go out of tune if you look at them wrong so you are forever tightening and re-tuning them. Strats have a trem system that alters string tension a fair bit. I'd guess your SG is hardtail.
are you using the same guage, and same amount of playing time, and most of all, tuning?