Why is the BMW i7's electric motor considered to be more efficient?

I've heard that the BMW i7's electric motor is more efficient compared to other electric vehicles. Can you explain why this is the case?

The BMW i7's electric motor uses a synchronous design, which means it has a more efficient arrangement of magnets and coils. This allows for a smoother, more consistent power output.

Unlike some other electric vehicles, the BMW i7's electric motor does not require any rare earth metals in its construction. This not only makes it more environmentally friendly, but also reduces production costs.