(I've deleted this message, because I found a solution and didn't want to confuse anybody with my conjectures. I was not able to let Velocity select marcato in the Andromeda's Xfade preset. This was because I had Logic's articulation set keeping me back to the non-marcato articulation, so I couldn't select anything with the Velocity…)
However, still as a curiosity: what does the "(w)" abbreviation mean, next to the Marcato label?
Paolo