No significant difference among major brands (Osram/Sylvania, Philips, Vosla, GE/Tungsram, Koito, Stanley -- in no specific order). Avoid other/off brands. And don't get caught up in a hype-vortex that's swirling around somewhere on the internet, where someone claims to have found a special Hella H9 that's 70 watts instead of 65. First of all, no, 70 is the maximum allowable wattage at 12.8v (73 max at 13.2v); there is no special 70 or 73 watt H9 as opposed to a normal 65 watt H9. Second of all, Hella bulbs can't be considered a first-quality brand.