Welcome to the wild world of plastic injection. I’ve been shooting the stuff for a number of years now and there definitely are a couple molds that are standing out in other forums that walleye anglers are doing real well with. If I am not mistaken you are checking the same query out on a plastic forum as well as here?
The most obvious advantage you’ll find that you have in injecting your own baits is color. Your ability to manipulate colors in the plastic puts you at a super big advantage over package baits.
I guess we have to friend each other here to get pm capabilities. Send me a request and I’ll ok it and we can share more specific stuff in that venue.