Whether one likes Canoe R more than Canoe P is wholly a personal preference and subjective.
Since I personally don't care that much for the Raven, I might prefer a lot of other 15' solos better.
On the other hand, if the Raven is your favorite ~15' solo, it's unlikely (but not impossible) that you would be convinced that a b*st*rdized 16' Pal is better. I use that terminology because I don't think you end up with a Pal if you simply reduce one's length by a foot. Rather, you would have to reduce all the Pal's dimensions proportionally and, even then, you may still prefer the Raven.
However, as Sultans knew, preference for one woman is not a reason to avoid, or regret, building a harem.
I say go for it because, otherwise, you will probably regret never knowing whether you would have had regrets about building a 15' Pal—which would be a regrettable state of future affairs.
Alex Comb of Stewart River Boatworks has refined the Pal into a 15' tandem or solo outfitted canoe he calls the
Ami, which I believe is one of his more popular models.