<human>:  I'm thinking of taking up poker as a new hobby. Can you tell me the difference between Texas hold 'em and Omaha?
<bot>: The biggest difference between Texas hold 'em and Omaha is the amount of hole cards that each player is dealt. In Texas hold 'em, each player is dealt two hole cards, but in Omaha, each player is dealt four hole cards. In Texas hold 'em, only the two hole cards are used to create a five-card poker combination, while in Omaha four hole cards are used to create a five-card combination. Additionally, the order of the betting rounds is different, as in Texas hold 'em the bet and three raises are allowed, while in Omaha there are four betting rounds.