low light performance : GH3 comparable to Canon T3i ?

[ntblowz]

GM1 + Mastor SF1 active gimbal make perfect steadicam on the go at really small size.  Should work for gun n run I think.

[Pascal Garnier]

I stay away from Neat Video cos of the render time ... 

[nigelbb]

I ran some tests tonight and the G6 with Natural style with contrast and saturation dialled all the way down performs slightly better than a T3i with VisionTech2 picture style and running Tragic Lantern.

The difference is not that big in lowlight performance, but as far as noise is concerned the G6 is the clear winner : you can shoot with the G6 at 3200 ISO and it'll look as good as the T3i at 800 ISO.  
Native ISO for the G6 seems to be 640.

I used to own a 600D (aka T3i) & now own a G6. Your tests mirror my experience. The 600D/T3i is OK up to ISO800 but above that it's too noisy. The G6 is clean & noise free at ISO3200 (it can't record at any higher ISO). In both cases it is always important that the image is adequately exposed it's no good underexposing then trying to push exposure in post or it will look like crap.