Troy, I loved your reply.
FWIW, in Rottweilers, there ARE significant differences most of the time.
Most of the time, males are larger, more dominant, more independent, more dog aggressive, harder to housetrain, and harder to keep fenced, particularly if left intact.
Males are more likely to bite you, an intruder, or another dog than a bitch is.
I do not recommend male dogs to first time Rottweiler owners, and would not place a male with a first time owner except in unusual circumstances.
As in most things, there are exceptions to every rule. There are bitches who are as tough as any male (I have 2 of them) and there are males who are very soft and easy to get along with (I had one of those too).
However, in general, in Rottweilers, males are a larger dose of everything that goes for the breed, both positive and negative.
JMO as always.