Relion Premier Voice is the newer model and it's just few bucks more than the Prime, the strips are the same low price, and it has a lot of cool features.
My vet was surprised how close it read to her pet meter in the office the other day, it announces the test result so I get to know what it is without having to look while I'm cuddling and stopping the bleeding on his ear so he can be done with it lol, it also tracks averages over time like it will tell you what the average results were for the last day, week, two weeks, month, etc. Its nice to see easily if their averages are going down or staying the same.