The plus is truly uncomfortable in the pants for most men and many women. It's a purse phone. The regular 7 is also uncomfortable in pants. Both are too big. The 7 Plus is just much too big--for clothes, not for eyes.
Having said that, I think the 7 Plus is a better choice, especially for those 45 and older, who have or will have presbyopia (as all humans eventually do). If both phones are too big, which in my opinion they are, you may as well get the benefit of "big" by going 7 Plus. I've had two regular 7-size phones and compared the two sizes extensively. Each time, I returned the 4.7 inch phone.