Poked around on-line and found that Yellow Bass have multiple stripes that extend the length of the fish from gill to tail. White Bass only have 1. Also, Yellow Bass have a broken stripe just above the anal fin.
Looked around in my fishing pictures and found one of each. The first pic is on the Wolf River, and the Yellow Bass is from the Fox River in Waterford.
Also, as I mentioned in a previous post, Yellow Bass are much better table fare than White Bass. With White Bass everyone has a "secret" on how to make them taste decent. With Yellow Bass you don't have to do anything, treat them just like Blue Gills - they taste the same.
Not sure how it is these days.
Center Lake in Kenosha Co. had some nice ones - really good size, and may still.
With White Bass you need to keep them on ice, cut out the mud line, and rinse, rinse, rinse, so that they don't taste "fishy"
Yellow Bass are just like Gills, you don't have to do anything to them.
Also, Yellow Bass have really thick shoulders. You easily get more meat off of your fillet from a 7 inch Yellow Bass as compared to a 8 1/2" Gill.
I typically grill my panfish on tinfoil with a little olive oil, and you can't tell the difference between a Yellow Bass and a Gill.
I fish the Fox frequently, and the Yellow Bass is the most consistent bite you will find. Don't think I've ever been skunked...
Really an underrated fish...
I doubt you will find any chain pickerel in WI. I know where they are plentiful though. East side of the Appalachians in PA where trout streams begin to warm and become smallie water. Caught a bunch as a kid. Now, grass pickerel can be caught just 5 minutes from my house. Not numerous, but present.