Of course, Picard Leisure outfit includes the grey inner tunic. It is One outfit.
Picard's leisure outfit has its significance in Trek fandom. This outfit was specially made to reflect Picard's lost of his individuality because of the Borg One year ago. Picard wanted something of his own.
The Jacket was introduced in episode-Darmok, and Picard also worn that in other episodes, such as Disaster and in Unification. Note these episodes were about the personal side of Picard.
Since so many people already have the lonely TNG Picard that was released a few years back, a different look would be appropriate. Of course, this Picard will have his standard uniform as an option. Best of Both Worlds. Younger Picard sculpt is obvious.
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