You're right that the system of government - absolute monarchy - was at the heart of the problem in both the French and Russian Revolutions.
The other similarities you list are definitely there, too (you could even go on: e.g., both Marie Antoinette and Alexandra failed to produce a male heir in the first several years of marriage, which in both cases became a cause for concern). But I think these particular similarities are largely coincidental, and when they're not, they're more symptoms than causes of a revolutionary situation (e.g., the hatred for the "Austrian woman" and the "German spy").
The actual causes of the French and Russian revolutions were far more complex and went much deeper than the personalities of individual rulers. Few historians can bring themselves to "blame" Louis XVI for the French Revolution, seeing it as something inevitable, that had been building for a century or more. I think we should look at the Russian Revolution the same way.
So I suppose I am saying that there are other, deeper historical similarities between the French and Russian Revolutions that someone better versed in French history than I might care to share with us!