Dfference between Astro 320 vs 220

[hunt-em-up]

Hey fellas just curious about the differences between the 320, 220 and Alpha. I don't know much about any. I've been running hounds for years on lion bear and coon.I have only used the quick track system and think it works great. I have a buddy who is always telling me I need to buy the new stuff, but I have heard collars die fast and have had dogs missing in the past for a couple days in nasty country. So if I could get some input on the everyone's thoughts it would be greatly appreciated.

[mr.c]

I use bought quick track for back up you can keep track of dogs easer with Astro. You have more features on 320 but 220 works as well for tracking.