Yeah all the Da Capo missions are very very similar.
The only differences are the text that Meryl says when boarding the boat and before starting the Painting or Harp minigames.
So if you get the barrel one, there's almost no difference whatsoever. (since she's not there to comment on the barrel thing)
[SPOILER="Meryl's Harp Comments"]
Reunion:
[Image: http://puu.sh/m4UMC/469e8cf901.png]
*DANCETIME*
[Image: http://puu.sh/m4UVs/2dae2ea04e.png]
--------------------------------
Da Capo #1:
[Image: http://puu.sh/m4Vhb/e668f8622d.png]
*DANCETIME*
[Image: http://puu.sh/m4Vpy/932fdd47bf.png]
--------------------------------
Da Capo #2:
[Image: http://puu.sh/m4VAM/f4c3915f25.png]
*DANCETIME*
[Image: http://puu.sh/m4VGK/b7629f6500.png]
--------------------------------
Da Capo #3:
[Image: http://puu.sh/m4VVA/2ddc51c3bb.png]
*MYLEGSAREGETTINGTIRED*
[Image: http://puu.sh/m4W4r/fd5e2b59f1.png]
--------------------------------
Da Capo #4 (Final):
[Image: http://puu.sh/m4WgT/664f9b8b82.png]
*W A S D SPACE SPACE SPACE SPACE*
[Image: http://puu.sh/m4Wpr/bc950d63e3.png]
[/SPOILER]
Wow, that took a while to put together, and that's just the Harp comments. @_@
Anyways, most people will get a hodgepodge of Harp/Barrels/Painting minigames.
But Meryl also has unique comments for each Painting puzzle minigame on Reunion/Da Capo 1/2/3/4.