Open track days anyone with a suit and helmet and a few misc. Can hit the track. And just because you have the power of a 1000cc dosent mean you have to use it. When i got my first bike it was 1/2 throttle to 3/4 throttle for the longest time. Aside from the size and weight.(which truly isnt much difference anymore)
Basically the whole point im trying to make here is that a 1000cc has more power and torquelower and sooner then a 600cc up top things slowly align with the too depending on modifications.(dont flame lol try to keep it simple)
A 1000cc is easier to scare yourself on, but at the same time you will respect it faster and when your ready to ride and have fun. All the power is there. Plus all the guys and groups you meet will most likely be sporting 750cc+. Its all about riding at your own level.
Hypothetically you can fuck yourself up on both bikes. An 600cc is easier to pick up then 1000cc lol.
Oh, and lowside is case best case scenario in a crash, thats bike sliding out from under and you sliding with it. Happends when tire loses traction mainly in a tight turn
Highside, not worst case but pretty bad. This is when tire.loses traction then regains it while its kicked side ways, causeing you to virtually slingshot off your bike up and over.
Depending on your gear and riding style this could be death or just changed underwear
always wear gear!
If you youtube it youll see some pretty nasty ones(moto gp). Lowsides they almost always get up , high sides is 50/50