I've done it for years, we use to can pork tenderloin back in the 60s so I started doing this 20 some years ago...
Is it better??? No, it's just much quicker to fix as you don't have to thaw...Just take it out, heat and eat, it's just that easy...Now I also put it over rice, potatoes, on a bun with BBQ sauce and even use it as a base for my vegetable soup...
According to what I have read foods both frozen and canned should be eaten within 12 months or so...I've eaten canned deer and frozen deer as much as 2 years later with no ill effects...When you open a jar, you will hear the top "pop" or break the seal, simply smell it, if it smells bad, toss it...I've never had this problem though...If you do happen to have a jar that doesn't seal, simply put it in the fridge and eat within a couple of days...
I store mine in a pantry, pie safe or shelf at room temperature...