I've had a scooter before but it's been a while so I'm not sure which to buy. I will be riding the scooter on the expressway from time to time and really want to make sure if I have to scoot, no pun intended, I can go with some assurance that I will make it. I also like to have a heavy throttle from time to time and want to make sure the scooter can handle, say, going 80mph without stress. I'm also 5'5" and I like both scooters, just trying to narrow it down.Thank you for your insight.