Percona/XtraDB storage volumes

One of Percona Server with XtraDB's main benefits is enhanced scala开发者_运维知识库bility over regular MySQL. Does anyone know how the data stored on disk for a given table compares between Percona/XtraDB and MySQL, i.e. is the same table stored in each system bigger, smaller or the same in Percona/XtraDB? I have a feeling it's the same, but would like to know for certain and haven't been able to find any relevant info.

I've only started looking at Percona/XtraDB, so trying to gather some info on it, thanks.

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It's exactly the same (unless you explicitly enable extra features).

Source: I work for Percona.

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Since XtraDB is an enhanced version of InnoDB, I would expect it to have a larger size. Never used XtraDB but since its a fork of InnoDB, it'd expect it to be such.

Btw what is regular MySQL ? MyISAM storage engine ?