Ok here is the poop IMHO...
If memory serves my well (sometimes it doesn't) there were only about a hundred 15T's ever built. They are rarely for sale and typically don't stay on the market very long. The 15T is a great little skiff that is economical to use and easy to maintain.
They are slower that the larger 17T's by about 4-5mph on average. They only fish 2 anglers comfortably and draft a bit more than the 17T due to displacement area. I fished with a guy who has a 15T. To quote him "the 17T rides like a Cadillac compared to my 15T" The 15T's do not have a live well but many of the 17T's do. That was my biggest reason to go with the 17T vs. 15T.
My 17T is a center console. I have been on both the center and side console and for me I like center better. I can put my trolling motor battery in it to help distribute the weight and for longer runs it's more comfy. This is a personal preference and by no matter is it the perfect solution for everyone.
DO NOT buy any "T" Pathfinder WITHOUT TRIM TABS... let me say this again... DO NOT buy any "T" Pathfinder WITHOUT TRIM TABS... One of the tricks to getting a T to run as good as possible in nasty chop is to point the nose down then heal her over on her side. What I mean is you want to run the skiff on it's edge (within reason for the conditions) and let the edge of the skiff cut through the wake. To do this, let's say your running is a decent chop, it's coming from the port side. You want to lift the port bow while lowering the starboard bow. This will run the skiff on it's side and will cut through a chop as best as the skiff can.
Here is a short video I made a bout a year ago when we took both tunnels to mingo. The owner of the 15T had his angler shooting video while we only too still shots. But in it you will see both my 17T with a 60hp and his 15T with a 40hp.
You will need Quicktime to view the movie.
17T vs. 15T
The 15T is a very good boat, but the 17T I feel is better in the long run.
Cheers
Capt. Jan