I've been on a Rolls for a couple of years and found it very comfortable indeed. However, a new bike gave me the opportunity to try the B17. So far, and I've only done about 250 miles on it, I'm not finding it at all comfortable, although today's commute was less uncomfortable than it has been to date so maybe it's beginning to break in. I also find it irritating that I keep sliding forward (as mentioned above), even though the saddle is level and everyone agrees 'nose up' is not a good idea for Brooks saddles. I'm going to give it a few more weeks - some say it can be up to a 1,000 miles before a B17 becomes comfortable - but I'm already thinking about getting a Rolls with titanium rails, or trying a Charge Spoon, which quite a few rate highly.
Having said all that, your choice of saddle is an extermely personal thing and recommendations around comfort levels are only relevant if you have same shaped bum as the person recommending it.
So, I'm not saying the Brooks isn't a good saddle - obviously it is - but I'm not sure I have a Brooks shaped bum.