Two years later, a housekeeping note for people who find this topic via forum search:
This can now be accomplished without a separate computer running Firestorm. The new sync feature built into firmware v3.40 and above allows a single Pixelblaze to sync patterns and playlists across multiple Pixelblaze (as well as to send sensor board data wirelessly to other Pixelblazes).
See how to use the sync feature in the announcement.