Brooks B17 vs. B17N

[TT Tandem]

I was wondering if anyone has had one model and then switched to the other?
Started with the B17N this past November and I am not sure if I should have gone with the regular B17.
So guys if you have used both could you tell me your experience?
Thanks!

[PSC]

I have both. B-17 on a touring bike with 3/4" of saddle to h-bar drop, it is real comfy. The B-17N is on my SS with 2" of drop and it is great also. I feel that if you ride with more weight on the saddle, then the B-17 is better. Buy a B-17 and if you don't like it sell it on Craigslist/Ebay, they hold there value.