Just an up-date on these in case anyone was curious:
Am running 2.35F 2.25R Nobby Nic 2015 in 650b. 2 months in and am very impressed so far. Weight is reasonable 705g for the 2.35. Roll better than Hans Dampf and clear better in mud. Grip has been good IMO, quite predictable, possibly not quite as tenacious as the HD or magic mary but a better all rounder.
No problems with snakeskin sidewalls so far. Feel more durable than the previous models and have better support for tubeless. I don’t run silly low pressures but have sealed well with tubeless with minimal loss of pressure and no burping or rolling that I can report.
I have only used pacestar F+R as trailstar compound wasn’t available but performance has been great so far and I won’t be rushing to change. Seem much more durable than previous schwalbe too, almost no signs of wear after 2 months on the rear.
The 2.25 on the rear, is obviously a bit narrower but also has a slightly lower profile. Good for rear but I wouldn’t run it up front on my trail bike. 2.35 is a nice size.
Hope that helps someone.