Among those 21 where the Gin-Kin brothers. That's some heavy meat, especially without the Sage's tools.
Also it's such a different type of battle. 10,000 Shinobi can never attack at the same time. And if they are fodder, than you use wide-scaled attacks to vanish large parts of the group.
A battle of 21 high level Shinobi is a very detailed one in which you have to focus very hard on 21 people individually and their arsenal of attacks.
Trying to wipe 'em out with an allround big scaled attack is wasting chakra, because they are probably too skilled to fall for that.
So it's not really comparible this way, although personally I find the 3rd Raikage more impressive as well.
But not better per se.