Budgies are much much much but soooooooooooooooooooo much quieter than cockatiels.
Cockatiels do have more personality and are smarter than budgies, but they can be really loud. You better live in a big house to have a cockatiel...
Budgies rarely chirp or do any sound at all. They are really good if you live in an apartment, if you live in a small house with no garden, or if you cant handle any real loud sound. They do have tons of personality and are smart, but they cant copy sounds as the cockatiels do, and are not as smart as they are.
Well, its your choice. I do love cockatiels, but they are just so loud, and after some time some people do regret having one. Having a budgie can be really fun, because they are colourful, are really easy to take care for and are really quiet (the most quiet bird I think), but remember, they dont like to be watched all the day. Good luck!
Last edited by Fieldz; 04-17-2012 at 12:42 PM.