Not had a great amount of time to compare the 2 lenses apart from attached shots. Crop of shot to get to actual pixel size (eg. no resizing). Shot on left is taken with 18-70 kit lens, with right shot by the 50mm. Same settings for each shot :-
ISO 200
50mm
f5.6
1/250 sec
RAW
No processing in PS
Was expecting 50mm to give better results

, although appreciate speed of lens for poor light conditions. Will give it some more time later this week for tests.
Anybody else done similar side by side comparisons ?