Good question, will be interesting to see how the posts go. I don't have enough experience using either to say which one calls critters better. My personal preference, Is custom calls and for these reasons. I like to support the "little guy", the independent craftsman that is applying his skill and experience to create a unique and beautiful product. The difference in cost is generally not much. Pride of ownership, I can say that I am proud to own each and every one of my custom calls, I can't say that about my production calls and some of them cost more than the custom ones.
That's just my 2 cents, bottom line for me is that calling critters with any hand call, be it production or custom, is more fun and thrilling that pushing a button.