I didn’t spot that - as I said I found the whole thing pretty mundane and interesting more-or-less only because there was an actual figure from a manufacturer comparing an ICE model with its EV “twin” - I haven’t see/heard that data anywhere, just vague figures. Oh and, as you say, the comparison between the state of the charging networks in the Eu and UK was somewhat enlightening.
Which was discussed in that article I linked which starts to put an actual figure on it which is useful for trying to make meaningful comparisons.
I’ll bet the excess is predominantly the battery.
The bottom line is that it is not quite as straightforward as “EV good ICE bad” - in fact there was another thread about this here - not sure that came to any useful conclusion 
There are other advantages of EVs though - just wandering past a line of petrol engined cars the other day I was struck just how obvious the pollution that they produce is (at least every other vehicle was diesel) - so air quality benefits enormously.
They are also cheaper to run but, whether than will last remains to be seen - fuel duty nets the government £28 billion/year long term they might want that back.