I think the website is just for "spec" comparisons. If you so choose, you could probably compare a Grom to a Harley Electra Glide..... no point in that of course, but you CAN compare 'em. I really wouldn't trust the website however as it has the Harley spec'ed with a chain drive. If I am not mistaken, all Harley's are now equipped with a belt drive and have been for some time now.
Mike