No exact matches. BuzzardBilly used 30 different IP addresses; Cornball has used five. There are two that are close matches:
Cornball - 70.252.50.143, and 70.252.52.229
BuzzardBilly - 70.252.53.139
The email addresses are completely different, but that doesn't tell us much. However, all three IP addresses, above, resolve to Amarillo, TX. The remaining IP addresses resolve to locations in Texas, as well, albeit to different cities.
My guess is it is the same guy, but no way to prove it from either IP or email accounts.
EDIT: BuzzardBilly was banned on September 19; Cornball joined on September 23.