A lot of goalies would look terrible behind our defense and PK, which was awful for most the year up until the last couple of months however both Monty/Primeau have done a very good job considering the circumstances. Allen was struggling before getting traded with a .892 save % and has been solid playing with a better team in NJ having a .913 save %.
I would say given he has a larger sample size, Montembeault is the better goalie right now given he is generally more consistent. However when Monty was Primeau's age he was a mediocre AHL goalie and would get lit up in the NHL, so Primeau is at an age where we could see some big improvements in the next couple years.
With Primeau's how much he's improved this year, I wouldn't be surprised to see him take over as starter as early as next year.