I just happen to have very similar handlebars at home and figured I will provide some comparison between the two.
The Rene Herse Maes Parallel in 46cm are the larger ones in the images below.
I compared them with the Nitto B135 in 45cm.
Both are measured at the drops. So the first question I wanted to answer to myself is how wide are they in the hoods.
The Rene Herse measure 45cm in the hoods whereas the Nitto measure 40cm (I measured outside to outside).
This is a significant difference.
The Nitto are also around 5mm longer in the drops and have a more aggressive "wing" span.
The Nitto seems to be more curved in the top part of the handlebar (where you'd connect the bar to your stem).
Both exhibit the same craftsmanship levels (obviously as both are made by Nitto).
Given that I was looking for a handlebar with a slight outwards flare but still with pretty wide top, I am pleased with the Rene Herse bars.
Now time to install and test.
Rene Herse front view:
Nitto front view:
