The Jack in the Box Sausage Sourdough Scrambler has that sourdough that isn't sour. I never understood sourdough but if you wanted sour it will disappoint.
Past that, you got a big sloppy sandwich that is filling and says morning. I wouldn't say it's a McMuffin but I would get it again.
If you're not going to Jack then this isn't a reason, but if you're there this is a find option.