We’re of course partial to Charleston, but here’s the truth. There are many similarities however there are some differences in our opinion:  Both cities are historic and beautiful.  Both cities are extremely walkable. Savannah, with it’s park-like squares maybe more walkable than Charleston.  Charleston has a more established and food scene with many more options.  Charleston has better hotels and shopping. Both cities have equally good tours. Charleston has better beach options. Savannah has Tybee which is great, however it’s 1 beach vibe versus Charleston which has 3 beaches with different vibes. Checkout this Charleston beach guide article: https://travelerofcharleston.com/guide-charlestons-beaches/ In Savannah you can walk with alcoholic beverages on the street. This is not allowed in Charleston. This can be good or bad depending on your stance.  Savannah is more affordable. TourPass offers all-inclusive passes in both cities: https://tourpass.com