You mean fat-tired e-bikes? I see them a lot in Amsterdam too. They're definitely more like mopeds and scooters than bikes, unlike regular e-bikes that pretend to be bikes. I'm not sure which ones I prefer (I'm not a fan either way), but they're both a massive improvement over the old fuel-burning two-stroke mopeds and scooters. (By Dutch law, two-stroke engines didn't have to meet the same pollution rules as 4-stroke engines, so these things were pretty dirty.)