Jean-Michel Duday’s answer is very good, I’m also adding a few things I’ve seen since our arrival in Baden in 2013.
2) Housing prices are generally lower than in France, and housing (in the west) is mostly in much better condition. Note that here I have not found a culture of “owner at all costs”.
3) The price of cars is sometimes much lower than in France.
4) The health and education systems work rather well.
5) My local taxes haven’t increased by a penny since 2013. Globally people are satisfied with the way their states (Federal and “Regional”) and their municipalities function.
6) Tolerance for corruption / lying is lower than in France when it comes to politics.
One MP had to resign because there was a lie on her CV .
And in 2011, it was the Minister of Defense…
8) In the East, however, I saw houses still in poor condition despite the years, and a less favorable employment situation – the proximity of countries like Poland did not make things any easier (Polish minimum wage: 520 euros vs. almost 1500 in Germany now).
All this makes it generally easier to live in West Germany than in France for the same salary.
All this is reflected in the human development index, which combines education, per capita income and life expectancy. In the latest published ranking (September 2018), France is 24th (between South Korea and Slovenia), while Germany is 5th.
To conclude, given that the anger I hear on the yellow vest side (corruption of elected officials, unrepresentativeness, overwhelming taxes, deficient public systems, purchasing power) has no real reason to be in the West, the number of potential yellow vests is suffering. But I wouldn’t be surprised by movements in Eastern Germany.