Is SC or GA more car hobby friendly?

This is the best site for Georgia.
Georgia Department of Revenue

• Motor vehicles purchased on or after March 1, 2013 and titled in this state are exempt from sales and use tax and annual ad valorem tax, also known as the "birthday tax". These taxes are replaced by a one-time tax that is imposed on the fair market value of the vehicle called the title ad valorem tax fee ("TAVT"). The fair market value is the taxable base of the motor vehicle. The manner in which fair market value is determined depends on whether the motor vehicle is new or used.

• You are still required to annually register your vehicle in your home county and pay the associated $20 standard renewal fee, or the applicable higher renewal fee in the case of specialty tags. The existing $18 title application fee still applies when the vehicle is titled. You must continue to maintain liability insurance as required by Georgia law. If you live in one of the 13 emissions counties, the annual emissions test is still required prior to registration.