Kgd has said it best. I love my SFA, and now I want to get all of them. The wetterlings are a lot closer in price these days, if that makes it any easier. I also have a wetterlings hatchet.
When I think of the two companies, I always think of the old Victorinox and Wenger debate, similar product, one is slightly more refined, the other the perennial underdog.
And one company bought out the other and kept producing them as separate pieces.
I loved my Wenger, which was my first sak, and it will always be special to me, but there is no denying the vics are just better quality, and I just enjoy using them more. I feel the same about my Axes.
If you have the money, you may as well get the "best", it's not like you are going to need to get a second mortgage to pay for it, and it's relatively cheap for a hand crafted piece of art.