It's the same saw - no updates.
Should your Kapex burn out outside of its warranty, the repair will cost between $300-400. And you will have to ship it to Indiana. So if you are getting a price on the used saw that allows you to account for this risk, then go for it. It's a great saw if it doesn't burn up.
Note that there have been some users on this site who have reported that their motor burned up more than once. It's not common, but there is the possibility a repaired saw could burn up. I believe the repair is warranted for a certain amount of time but I'm not sure.
So you'd have to be getting a screamer of a deal on the used saw to justify the risk IMHO.