My initial reaction to the PBS is that it is a small UDS that you could probably make yourself for fifty bucks or less, that retails for 329 bucks. I don't know how it is finished, but it doesn't look like porcelain enamel.
I got my first Weber kettle in 1995, and still have it and use it -- and it looks good, too. I expect to have my WSM until I'm in the ground, myself.
I'm sure you can cook good Q on either one.