Does this mean that Germany is more experienced (veteran) team than France?
Nope, but I think the German's mentality as a whole, is more serene than the French, and the same applies to the players. To give some specific examples, I think Kroos and Muller are more likely to score a penalty goal than Pogba and Mbappe. I also think Neuer is more likely to stop a penalty compared to Lloris.
But in penalties anything can happen though.