Your Whippet has been designed with lightness in mind, and weighs in at an impressive 13.9kg. Most ebikes are at least 18kg and many are as much as 28kg. That means that a lot of the power assist goes into moving the bike rather than the rider! It also means that if you run out of battery charge then its really difficult to ride the bike or even push it. That's not the case with a Whippet, at around the weight of a bike range anxiety is not an issue, you can just pedal home!
The Whippets' light weight also means that its a doddle putting it onto a bike rack or if you live in an upper floor flat. You want an ebike to make cycling easier and more fun, makes sense to get a light one, right?