Here is a link to the King Arthur flour company blog. It is about their take on the differences between butter and shortening.
Also have found that in using old recipes that call for specific ingredients like one can of something, or one box of of something, to be careful because the weight and measurements of those ingredients have changed over the years. For example, an" old" recipe I have calls for an 18 oz box of cake mix ( this is from the 80's). Well, found that all current cake mixes are 15 oz. In my recipe it didn't matter as I was cutting the recipe in half and only needed 9 oz anyway. Threw the rest away.
Good luck with your baking.....still trying to decide if I am going to or not this year and how I would mail them off if I did.
https://www.kingarthurbaking.com/blo...tter-in-baking