The two Hindemith Sinfoniettas are not the same piece; the "Lustige
Sinfonietta" Op.  4, dates from 1916 and was not published during the
composer's lifetime.  I believe it was first published in the Hindemith
complete edition.

The Sinfonietta in E was completed early in 1950.  It was a commission
from the Louisville Orchestra, although the miniature score doesn't mention
this.  [Source:  Luther Noss, "Paul Hindemith in the United States", U of
Illinois Press, 1989, pp.  133-135 ]

Joel Lazar
Bethesda MD