I think this is a matter of personal choice and confidence. When I fish the IL river, I don't use jigs with eyes, because #1, I lose too many, and #2 I have tried like many of you with side by side tests, and it didn't seem to matter. On the lakes in northern IL, I get more fish on jigs with eyes especially bass, and walleye, I don't know why. With that said I sell a ton of jigs all year long, and all the bass guys want eyes, the walleye guys about 50/50 yes and no. The biggest factor I hear more about is color. This response probably doesn't answer your question.
"Practice, practice and more practice and when you think you're good, practice some more." circa 2006 Cadman