I don't think of either one as "sweet". If one came closer than the other it would be Equipage. Both are nice, but I find them both dated. Bel Ami is not as harsh as Knize 10, but it still reminds me of something from yesteryear - it is not a clean modern leather fragrance. Coincidentally, I wore both of these this week. Both are nice, and worthy of getting a decant / sample if you can - but I would certainly not recommend either for a blind purchase.
I only have the newer versions, so I can't speak to the vintage.