Question for speaker experts

[JimShaw]

I am running Speakercraft AIM8 ones as a 6.1 system. The Ones are low end of the AIM8s and AIM8 fives are the top end.

My sound is fantastric. I love it but I am always trying to produce and even better sound.

Now my question for speaker experts.

If I remember correctly, the center speaker is generally for "voice" and if this is the case, do you think I would get a sharper or better "voice' sound if I changed the center speaker from the low end AIM8 one to the high end AIM8 five?

I know there are a low of unknowns in this but would this speaker change generally be to the better?