Appelgren: 7 plies made of kiri (core ply), ayous (2+4), carbon fleece Zylon (3+5) and spruce (1+7, outer ply)
Waldner: 7 plies made of kiri (core ply), carbon fleece Zylon (2+4), spruce (3+5) and spruce (1+7, outer ply)
According to Donics website, Appelgren seems to be an inner construction...