Yep, I agree. If I had to choose one or the other, I'd take the blender as they do handle liquids.
But then, I'm from the pre-food processor era. I can remember being so thrilled to get a blender as a gift. My first post-graduation appliance.
I kinda think that what the blender does not handle because it is really meant for liquids and chopping in a liquid medium, can be dealt with by the stand mixer. There are a few bits inbetween (dry chopping such as a mirepoix) but they are so minimal, that if you need to make a choice, I'd take the blender and the mixer.