Here are all the differences I've found or heard of between the two, both officially and unofficially. Drove an A-Spec ITS and FL5 CTR over the weekend to help inform it, too.
Please correct me and/ or add to this.
ITS:
-Louder "high flow" flow exhaust (possibly adds the +5hp? or perhaps the...
Any chance we see some reviews before the pre order date? Would be nice to know differences in behavior vs the CTR before putting down a deposit.
Some initial launch coverage claims the suspension would be tuned a bit more toward comfort, and I'm curious to learn about differences in on-street...