Good bright headlight to replace the stock headlight?

[oj88]

Are fanless led lights really much better than led lights with fan?

Better in what?

But to answer your question at face value, not necessarily. Start with a reputable brand then make sure that the specific model you choose is for the right application. Cooling methods are not that crucial for as long as it is designed for it... hence, the need to pick a good brand (one that has done sufficient R&D) and using the correct bulb for the application.

My 2c.