It's not a detuned cub, its the same port layout just not as aggressive. You can always port a serval later on and make it a cub. If you haven't ridden a cub, I would find somebody that owns one and see if you like it. They're not for everyone. That's why the serval is so popular.
Having said all that, I chose a cub over the serval because the banshee isn't my daily driver and I wanna go fast lol.