Marathon Racers apparently have worse rolling resistance than standard Marathons, without quite the same puncture protection, so other than weight saving, I really don't see what the point in them is.
Well, the bars changed the bike again for me, after a few months of riding mostly road bike. This brommie is a 2018 M6E model which I'd changed to the JK ergonomic mid-risers, which I also liked. Just, after a few long rides on a road bike I'd bought to stick on a turbo in case the first lockdown stopped outdoor exercise as it had done in other countries, the brommie was feeling a bit Mary Poppins. Hence switching to these bars, giving excuse to get new Borough bag as T-bag is fine unless you want to steer (plus mine was getting pretty worn).
The bars have just made it feel like it did before I got the road bike in some ways. I'm might chop them down a couple more millimetres, and I really probably should shorten the cables now I'm settled on keeping them. Not been out on a "long" ride with them yet, but nothing on any of the rides I've done so far make me think I'd want to change them for long distance. More practical space for additional accessory attachment too, but that's just S over M. Great value too, but it was a bit of a wait this time.