There are always tweaks being done, but most are offered by after
market venders. Auto makers are regulated by the Federal
Government to meat safety and emission standards. Yes there are
different changes that can be done, but what is offered by any and
most all car manufacturers is a compromise between government
regulations, competition, building costs, and what the "average"
consumer will buy/wants. Corvette racing division does produce a
different product, but they also are regulated by the racing body they
are running in. the overall concept of the C-7 Corvette is
unchanged, the engine is still for the most part unchanged, in size
and build. Write to Vette magazine with this question, they should
have the answer. As far as I can remember, if there are any
changes, it is very minimal. What was once offered as an option
order is now offered as standard on some suspension parts, but the
transmission, drive train and engine remain the same.