Losi 2.0 all the way. Just ask Jaz he will tell you Losi rules!!!!!!!!!
Seriously I dont know a ton but what I have learned on here is this.
They are close to the same platform. Its rumored that the 808 is a copy of the 8. The parts are more expensive and less avaliable on the 808 as many local hobby shops do not stock the parts.
808 your going to have to build from the ground up as its a kit. The 2.0 is a roller and comes 90% pre built. Its up to you on what you perfer.
I have never heard anyone say they hated ther 808 and it is has always had great reviews.
What are your friends running or what is more popular at your local track. That would be a good indication on what you should get.
Keep in mind that you will still have to spend upwards to $400 after the purchase of the buggy for engine and electronics unless you already have all of those.
You cant wrong with either however I have never driven and 808. This is based on what I have heard here on the forums.