Jacobs is good and IMO a bit better than Mo Magic at times. The ribbed body doesn't have much to do with it, but the tail design is one I hope to duplicate in my floor tile pours after I use up ones given to me. I have no idea why the injection mold is 40% higher in price and the finished lure priced higher on-line.

I go nuts modifying soft plastic, so here's one you might consider:
Take a Mo Magic grub and make two slices in the tail. The pill shaped grub body is perfect for the new three pronged tail and has been working better for me in cold water than the original tail. The tail to body ratio is now different and object vulnerability maybe somewhat improved. Just saying....