similarities between red and white wine?

[Innkeeper]

Hi Jolsen and welcome to the Wine Board. I suppose I could be a smart a--, and say they both contain alcohol and are made from grapes, but really can't think of any other similarities. Can't even say they both taste best when dry, because many whites (Riesling, Chenin Blanc, and others) sometimes taste best when off dry. Maybe someone else can help.