Interesting. Another difference is that it climbs out at 30kias, and not Vtoss, only going to Vtoss with an OEI are CDP. Again as a generalisation, the twins I have flown (and they are limited in number ) generally climb out at Vtoss.
Is that to achieve high climb angles for the S61? Or another reason? Is Vtoss a variable speed in the S61, or is it fixed? Or is it about 30?