Lutron is hands-down better than Somfy. Much quieter, shades move at the same speed, 3-6 year battery life, 8 year warranty etc.
However, Lutron does not offer a blind retro kit like Sonfy does, nor does it have outdoor options.
If you are going with Lutron Tilt (louver) solutions, then you can't use the Smart Bridge Pro or Radio Ra Select -- you will need the standard Radio Ra 2.
You don't need to use the same company for all your shading. You can use a combination of Lutron, Somfy and even Hunter Douglas (which actually works well now).
We are a motorized shading dealer for a number of companies. If we can help, let me know.