There are a couple of things to take into account when changing from 6.00 to 7.10s.
First, the kart will tighten up a little more and a little faster due to the wider rubber. I found that you almost certainly want to go as wide as possible in the back (just under the 55″ maximum allowed) to offset this. Maybe it was just my karts, but we typically were around 54″ with the 6.00s.
Second, the 7.10s typically have a greater circumference than the 6.00, which does affect gear. It’s not a dramatic change — maybe one or two teeth — but a change nonetheless.
I tend to agree with TJ in that there is no difference in driving style.
So, all in all, nothing major that one or two practice sessions at the start of the year won’t discover.