We have done a side by side by side. 300, 500, and a 3000.
The 300 is a great 2nd camera for the 500. However we were using the 18×4.2 lens not the 17x that comes with it. We also have the ACM-17 to switch between lens if we ever need to. Can you tell the difference yes. Can you tell after the upconversion to 1080i ?
The 300 is a great 2nd or insert camera, We have done a few music events where the 300 is the on stage camera with the 18x and the 500 has the 22x lens. The work flow,timecode,etc work fine. Both have the Vari frame rates.
We tested all three cameras on a 24 Panasonic LCD. We rent the cameras. The 300s go out alot more then the 3000.
300 blacks v 500 blacks = 300 not quiet as strong in the black department. But for 10k, it looks great.