Probably not a fair comparison but in this thread I complained about the result: http://www.iceinspace.com.au/forum/s...ad.php?t=94148
Even despite all the noise, much of which is to do with the camera I was using and the other half being the extreme curve applied you can see significantly more stars and nebula in the recent shot.
I'm shooting with a D800 and Celestron C8 mounted on a NEQ6, guided with a 50mm Orion finder guider. I'm using the cropped frame 24x16mm but it's still a relatively large sensor. I get those edge distortions despite using a field flattener. It's worse without it.