I would say the Ruthless Aggression was more balanced.
The poster boy was Lesnar, who wasn't exactly a larger than life personality. The roster followed suit emphasizing a more aggressive approach to getting over.
The Divas division was impressive and the main event picture had new faces coming in and out.
The Attitude Era hit while the iron was hot. Whatever worked, really worked so there was no need for 'balance'.
If the midcard stunk, it was because the main event picture was already hitting on all cylinders.
The Attitude Era was cool, crossed over and had, well....attitude.
My preference was Ruthless Aggression because it was more competitive and lacked a pure identity.
It's lack of true star power effectively forced that time period to be very basic and kind of bland.
Wrestlers began using their real names and had to please a crowd that wasn't easily impressed.