I know this form. Old but one day there mit be some like me fliping throw trying to find out the diffrent. Between the 4 cars not 2 but 4 there are four x-1's each with diffrent top speeds
the s.v. x-2010. Has a top speed of 318 to 324 mph
The normal version of the x-2010(this is the one you can buy in any color has about the same top speed as the SV
Now as for the x-2010 carbon prototype I'm not shore but from what my friends that have it say it has the most customization out of the 3 2010 models and can have a top speed of 330 to 345 mph
The 2010s are a lil smaller in size when comepared to the 2011 X-1
Now for the x-2011 has hp of 1635 has same rpm as the 2010 it has a wider base and has a top speed of
360 to 362 mph and that's fully tuned. To set it up like that is kind of tricky and many people don't know how to do it.
Holy 8 month necropost with a bonus triple post.