MP3 vs CAF: Does it matter which audio format is used for sound effects in an iPhone game?

We're building an iPhone game using PhoneGap.

iOS devices support many audio formats, and we are thinking about using .mp3 or .caf files for the sound effects.

Does it matter which audio format is used? What are the differences between using one versus another?


CAF for Sound Effects

MP3 for soundtracks (mp3 files can't be loop, it has a small pause in between)

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