So much of the nutritional difference will be related to:
1. the type of butter you are examining, and
2. what specific nutrients you are exploring.
Both can be a part of a healthy diet, both are considered a meat/protein type food, and both contain healthier types of fat.
Checking the USDA food/nutrient database can help give you the numbers you are looking for. Here is the link. Type in peanut butter or cashew butter and select the variety of your choice. ndb.nal.usda.gov/ndb/foods/list
SP Registered Dietitian Becky