Wins, GAA and Save Percentage, who is the better option this year?

I have Lehtonen and he is killing me. I've been offered Neimi and a 7th round pick for Lehtonen and my 3rd. When the dust settles at the end of the season, who will have better numbers? Making this move also frees up some cap space for me, not a huge factor, the scoring cats are the big issue, but cap is a consideration. This is primarily about this year, however, long term, any thoughts on how these guys might compare?