Mortirolo - steep, but wooded (shaded) from the north side. Tough, but not too long. Starts steep, gets steeper, and then a series of switchbacks.
Gavia - from the south, west. Tough, and keeps getting tougher, with some, long ramps, as well as switchbacks. A long climb, and you can feel the thinner air at the top.
Stelvio - just a great climb. Nuts at the top.
Mortirolo - steep, but wooded (shaded) from the north side. Tough, but not too long. Starts steep, gets steeper, and then a series of switchbacks.
Gavia - from the south, west. Tough, and keeps getting tougher, with some, long ramps, as well as switchbacks. A long climb, and you can feel the thinner air at the top.
Stelvio - just a great climb. Nuts at the top.
All marvellous.
I'd favour the 28 on the back...