Picture1.Picture vs Picture1.Image

I have a picture loaded into Picture1. I have Picture1.AutoSize = False. If I use the .Picture property when transfering the picture to another Picturebox using GDI+ I get get the full size of the Picture eventhough Picture1.AutoSize = False and the overall size of the Picture1 control is much smaller that the picture in it. Now if I use the .Image to do the same thing I only get what is actually seen in the small size of the Picture1 control.

Can someone explain this to me.