Having owned both breeds, and at the same time, I believe this survey is very inaccurate. I left a comment/review... The dogs may resemble each other in stature, coat, appearance, Hunting capabilities ... but it pretty much stops there. Their personalities are very different!! As for intelligence. I believe they are very close, or equal. The only Big difference I have found thus far, is our Weimy had a much greater vocabulary, we could talk to her like a person until it came to making her be QUIET and then she was" An Idiot".
The Weimaraner is such a "Thinking Dog" ours would not only figure things out, she would actually perceive (example
At the age of 11 yrs, Greta (Weim) and Foxy (V pup 5 mo.s) are playing around a swimming pool. It is Foxy's first experience with water/pool. Greta is beyond the age of jumping in and swimming (as she used to LOVE). The water is cold, it is January. Greta watched Foxy put both feet in the water on the top step of the pool. Greta see's Foxy's curiosity, but Foxy has not gone deeper "Yet". Greta walks into the pool down the steps beside Foxy and swims around the pup on the step, an then climbs out, she never takes her eyes off Foxy.
In my opinion she could see Foxy's interest in the water, and gave her a demonstration/visual of what would happen if she went further.
As for affection ... I feel both breeds are very affectionate, The Vizsla just acts on it's feelings and is more physical.