As long its an electronic ballast, not the conventional coil ballast, it should not matter that much when talking about heat generation and the flickering of tubes during start-up. Just an equipment converting electricity to a suitable amount to drive the light tube.
The main factors are the tube used which generate the quality and spectrum of light and the quality/maintenance of reflectors which channels the amount of wasted light back into your aquarium.
Just my 2 cents worth of knowledge. Hope it helps...