Excuse me?? "... a good copy (of the 3.5) comes close to the new 150 br 2.8"...?!?!?!
At f11 or f16 I'm sure it does.
I have the 150mm f3.5BR and 120mm Macro f4BR; I got the 150 for a bargain price from a very kind man and accept its limited utility without hesitation. It shoots great landscapes on location with its sharp focus at infinity. But portraits with dazzling Bokeh? Forget it. As for the 120mm, it's ponderously slow to focus, too slow to capture vibrant moving portraits, and scientific in its assessment of skin, and optimised for close focus. It's a great Macro lens. On people it's brutal.
I've owned two killer portrait lenses, the Zeiss FE110mm f2 and the Canon 85mm 1.2. Both yielded the most exciting wide open images you could dream of that blew away me, my clients and my competitors.
So if you want to seriously stamp your mark in portraits, get the 150mm f2.8 BR.
By the way, Gary Sarre's comment about the 110's view being like "looking at your girlfriend from the next pillow" was just beautiful, and is spot on! BUT in practice you will unnerve many amateur models/clients as they'll feel their space is being invaded and you may struggle to fill the frame as much as you'd like. And you will have an issue with lights behind you.
Yet 150mm f2.8 gives you the look and sharp details and the working distance. Home Run!