The 0-62 is governed by the gearchange point, and most cars will need a 1st/2nd change in that sprint.
But logically it should be quicker than the Series 1 to 62, by an odd tenth of a second or so.
280bhp sounds better. It was up in the air last September when we were discussing this very thing with the elders at Malvern.

DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4