[Closed] Nivolet or Sanetsch

I am heading to France in July for the Tour du Mont Blanc and am looking to do a warm up ride a few days before.  I am arriving in Geneva on the Tuesday late afternoon, and am looking to do a ride on Wednesday morning.  I'd like to do a good climb and descend to get my head into the descending mode, and was looking at climbs that are not normal options.

I've found two that are in the area:

Colle del Nivolet in Italy, or the Col du Sanetsch in Switzerland.  Both look like good climbs, on quiet roads and spectacular terrain.

Anyone done these or have any views on which I should choose?