1792-Austrian and Prussian Flags Question

[OB]

I can feel a 1792 project coming on for the New Year and am looking for some advice. 

It looks to me that Austrian and Prussian 1792 flags look very similar to those carried in the Seven Years War.  Is that the case and can anyone advise on any differences I should be aware of?

Also how many flags did Austrian and Prussian infantry battalions normally carry?

Thanks in advance for any information.