Replying to Liberty antigen VS atomic infamous

I have found a pair of 11/12 liberty antigens and a slightly more expensive pair of 13/14 atomic infamous and i was just wondering which ski would be better for me. I am around 5'9 and pretty skinny and I ski everything in the park but mostly rails. I also want something that will serve me well all-mountain too though. I was wondering about the durability of both skis and the softness mainly. I also want to know if there have been any changes made to either ski since when they came out. If you can help me out at all it would be much appreciated.