Except it's efficiency for the same class of vehicles we're talking about, so a bike is an apples to oranges comparison.

Proton Exchange Membrane is 40-45% efficient. Generating hydrogen from electricity is 70% efficient - meaning for a kWh of input electricity you get 3x the motive power from a BEV.

Then rolling out a refuelling network, with the high pressure tanks and expensive delivery mechanism, will cost far more than installing EV chargers - and that's before we even get onto the CURRENT penetration of EV chargers vs Hydrogen filling stations today (16 in the UK, 54 in the ENTIRE US, and not growing).

Hydrogen might be the solution to emissions from haulage, but BEV's are more than good enough compared to the ICE cars they're replacing for 99.9% of motorists needs. Yes, I'm ignoring the "I need to drive 1000 miles without stopping for fuel, rest, using the bathroom, come back when an EV can do THAT" people.

And on burning EV's, they catch fire at rates 20x lower than ICE cars, and LFP chemistry is far more resistant to thermal runaway.

Now lets talk cost - over the life of the car the BEV will be cheaper to run. Filling a Mirai in the UK will cost you around £90 for 400 miles of range. Charging my EV6 from 0 to 100 will cost me £5.50 for 300 miles of range. We're talking near orders of magnitude difference in cost per mile here - it's almost an unfair advantage that you can charge an EV at home off peak for next to nothing.