You can get much more for your cash with a KMG if you're willing to put some of your own time and effort into it. Finding a motor, controller, mounting plate etc and making your own tooling arms can save you some money. Going with step pulleys over a speed controller can save you money if you require VS. If you get everything from Rob for a Cadillac KMG, it's not as much of a savings over the Bader, but still some.
The Bader comes with a small wheel but no platen in the base, the KMG comes with a platen but no small wheel in the base. The Bader is direct drive and the KMG is generally belt driven, folks have differing opinions on which is better. The Bader comes painted where the KMG does not.
I have experience with both machines and would highly recommend either. I feel that as soon as you "trick out" your KMG, the Bader becomes pretty much the same value. Imo, it's only if you decide to put the work in and DIY a couple things that the true savings come about with the KMG.