DarienLaker

They both have Boomerangs and SLCs! Six Flags Great America and Kings Island?

They both have boomerang style coasters! California's Great America and Darien Lake?

Twist

Viper used to have vending machines in that little shack in its queue line back when Darien Lake was owned by Six Flags, but I think when Six Flags sold DL the vending machines were removed from Viper's queue.

They both have B&M looping coasters Six Flags Great Adventure and Six Flags Worlds of Adventure (AKA Geauga Lake)?

Grahams

Circle

Circus

Shot

Beer

Mars

Snoopy

Donald Trump

Darien Lake

Fries

Green

Habit

Fabric

Topic

Way

They both have wooden coasters! Six Flags Discovery Kingdom and California's Great America?

They both have blue tracks! Knott's Berry Farm and Six Flags Great Adventure?

Round

Clones

They're both green colored coasters! Drachen Fire (BGW) and The original Bat (KI)?