For reference. The Philips is 65 watt as well, but it doesn't have the tint to make it whiter. My thinking (unconfirmed) is that if you use the same power (65 watts) but subtract some light (with the tinted glass) then there is less light on the road.
You are absolutely correct. There are two ways to get whiter light. You can burn hotter, but to do that with the same power you likely need a thinner, more fragile filament. More likely a bulb would use a bluish tint to filter out yellow light. Filtering is synonymous with subtracting. The yellow light gets absorbed by the tint and gets re-emitted as useless heat and infrared. Basically, useful light is transformed into useless energy: you lose it.
With incandescent lighting, whiter light usually comes at the cost of either usable light or durability.