Question about Boys & Girls?

[AFTERSCHOOL]

I was reading the article about A BEST on Jpop Stop and found this:

The songs "A Song for ××", "Trust" and "Depend on you" were re-recorded for this album along with "End roll," which wasn't announced to be re-recorded, and "Boys & Girls," which had a new instrumental part but the voice still being the same as the older version.

Where is this new instrumental part, and is the track length of the Boys & Girls on A BEST any different to the one on LOVEppears? Which Boys & Girls of LOVEppears / A BEST is the one that features on A COMPLETE ~ALL SINGLES~? Thank you!