If you are voicing one of these two just send one submission. You don't have to voice both. 

orbot: Serious and intelligent, Orbot is loyal to Eggman. However, he does not like him very much, and his spiteful sarcasm sometimes provokes the anger of his creator.

cubot: While still a competent henchman, Cubot is talkative, not very serious, and generally annoying to those around him. Also, despite his devotion to his master, Cubot is lazy. Unwilling to take action until he is scolded, he actively tries to get out of doing any work.

[Impression or original voice, your take]