IMO I don't think there is a difference.
Both are tomato based.
Often the pasta sauces you buy will sometimes have other things added ( like mushrooms, onions...) , or a chunkier consistency.
Pizza sauces may be a little simpler as to what is added in.
The spices will vary on the brand or who is making the sauce, but I would assume both would have Oregano and Basil ( and probably garlic).
Anything added to a pasta sauce would taste just fine in that casserole anyway.
Therefore, choose whatever pizza or pasta sauce that appeals to you. I don't thing you can go wrong.
***That being said, I'd personally stay away from the Chef Boy ar Dee, unless you're looking for that Nostalgic, taste from your childhood