There is no such thing as "not statistically better, just more secure" [1]. If an AES DRBG systematically fails your statistical test, then something is wrong.

There is no such thing as "not statistically better, just more secure" [1]. If an AES DRBG systematically fails your statistical test, then something is wrong. Probably your DRBG implemetation, or your test. [1] https://en.wikipedia.org/wiki/Distinguishing_attack https://en.wikipedia.org/wiki/Distinguishing_attack