I don't think this is correct as regards the 2s.
At the moment each operator runs 6 buses, with a round trip time of 80 minutes. This provides a combined frequency of every 6-7 minutes (9 bph).
Off peak the combined frequency is going to be every 10 minutes, so that's 8 buses.
Peaks it says it will be every 7-8 minutes, implying 8bph. That might be 10 buses, more likely 11.
So for Stagecoach it isn't neutral, it is plus 2 during the off peak and plus 4 or 5 during the peak (ie pvr).
OBC, as said, it is down 6.
I haven't looked at the other figures but I do agree Stagecoach seem to have come out marginally worse than OBC. Maybe there is something else in the equation - Stagecoach seem to have done well with the H2, H4, H5, 700, 800, 900, assuming these are all subsidised.