i think you were looking for the differnces between the species, correct?
budgies are usually friendly little happy creatures that are more then satisifed with the littlest things in life. they usualy like to interact with everyone, and are comicle.
greys are very differnt. They are probably the most human-like of the bird world, and interact with you in ways that you have to think and say "wait, thats a bird!" They are lifetime companions. Thier upkeep and medical costs can be expencive. They do tend not to like change, and can be fussy.
girls have 'tudes
**lol** just kidding... they let you know what they like, and just what they dont. Dont be surprised if that $40 toy you just bought is hated by the bird, and never touched....tho...it will love the box it came in!
I love Greys. They are my favorite species spanning my 30 years of birds!