one man does not a philosophical culture make. if every Frenchie was like Descartes or Nicod, France would be in the same league as Germany. If every German was like Heidegger, then France would be in the same league as Germany. Unfortunately for France, neither of those things are true.
Except the French as a whole are absolutely lousy with Cartesian logic. That in itself doesn't lead to philosophy (probably the opposite), but seriously man, I think you're taking too limited a view of both the history of philosophy in either country, and what has been going on outside philosophy proper.
There's Leibnitz and Kant in Germany, and yet somehow then it all derails into Herder, Fichte, Schelling, Hegel, the Schleiermacher brothers etc., all this Naturphilosophe and idealistic dialectics. And then you get the reaction, so along come the Mechanistic Materialists like Büchner, Vogt and Haeckel, and less extreme philosophers like Herbart (Kant's successor, second most important German philosopher after him in the 19th c.) and the neo-herbartians, and a whole group like Post etc. taking their cues from J.S. Mill, and then there's always Marx. Which leads to the next reaction, and then you get the downright irrationalist philosophers, full of crap about Destiny, Blood, Soil, Race and Aryans, and by that I do not refer to Nietzsche. (He did pick up some tidbits from that quarter though, most importantly from the German-American national economist Theodor Poesche.)
In general German philosophical tradition tends to be idealistic. Which wouldn't seem to go over too well these days. To get the kind of line-up of major philosophers you seem to recognise you have to cherry-pick them. If you do that for Germany, Germany looks good, if you don't do it for France, France looks bad.
But I'll happily grant that Germany has turned out a damn sight more philosophy than France through the ages, I just can't see how they have provided more consistent quality.
And of course, my perspective on this is 100% historical. As such, I find it interesting that you are taking exception at French 20th c. philosophers — which is your prerogative (and I'll nod along to the castig out of someone like Lacan, and even Derrida) — but I am wondering where their contemporary German philosophers of similar stature are, to be eiher lauded or condemned?