XL2 or PV-GS 400?

Greetings. This may seem like a silly question to some, but here goes. . . . .

I would like to get some feedback. I currently have a XL2 and considering selling it for 2 PV-GS 400 or 1 PV-GS400 and a PV-GS 500. I will be using the cameras for performance / theater videos. Low light is a concern, although I do have stage lighting and a couple video light packages. Another reason I am considering selling the XL2 is it's quite large. For example, I wanted to record my daughter in a parade today but really didn't want to lug around the XL2, the PV-GS would have been with me today if I had one.

Image quality is my main concern, all the extra bells and whistles is not as much of a concern. Being able to sell 1 camera for 2 is also appealing. 1 for closeups and one for full stage shots. I realize the XL2 is a higher quality product, I guess the main thing I wanted to know from those in the field who have experience with both if there is really much of a difference in video quality.

I'm not taking lighting and techniques into consideration, and I do realize the XL2 is the standard workhouse and more of a higher end prosumer cam, but again, looking at my end product, will there really be much difference the image quality. Or will be only be something noticeable when doing an A-B comparison?

Any thoughts?
I appreciate any feedback you may share