Yes the difference is visible. I took 2 shots one with the sofrin cells and one with the 30Q on manual settings in my camera as it should. First is the 30Q's and second is the Sofrin ones. Difference is visible, i personally see a 30-40% increase in luminance in the hotspot. Both cells were not fully charged nor they were fresh out of the charger. No, i won't be using turbo more than 20seconds myself that's why I want to have the highest drain cells for the maximum output. Plus there are 3 in there so the capacity and runtimes are too great to worry about that. It also doesn't get that hot that fast in my opinion. It is bearable and i have setted my thermal limit to 55°.