I agree with the posts. I have a 142 nrs and a nrs 16 foot E boat. In the past, I have had 12 footers and 15. I had a 15 foot river ryder bucket boat over 3o years ago. The difference between that an the 14 was a little longer nose.
You will notice very little difference between 14 and 15. We chose a 142 because the narrow boat allows us to do little rivers like the Salt yet, with the bigger tubes (bigger than a 12, 13 foot boat, my passengers stay dry-er and, it floats high especially, on low flo situations like the salt.
We, obviously, needed a big water boat so we got the 16. I would love an 18 but it's just too big for me out of the water moving it around in storage.
If you want (clearly) more room get the 16 footer. That 160E is a nice handling boat even loaded with 10 days worth of gear. On our last salmon river trip I loaded the 16 with 2-37" dry boxes with kitchen and food, I sat on 1, my wife sat on the other, 2-120 qt coolers, 1-100 qt cooler, and a bunch of rocket boxes you know, groover and such, and of course, personal drybags and personal ammo cans, big first aid rocket box, 2 fishing tackle box ammo cans, 6 fishing rods,, repair kit ammo can, 2 flat tables, I use both as cargo deck..I think that was it.