short answer:
Apache ->wheels
Cobra ->skids
Bell AH-1Z Viper
https://en.wikipedia.org/wiki/Bell_AH-1Z_Viper
The Bell AH-1Z Viper is an American twin-engine attack helicopter, based on the AH-1W SuperCobra, that was developed for the United States Marine Corps as part of the H-1 upgrade program.
The AH-1Z features a four-blade, bearingless, composite main rotor system, uprated transmission, and a new target sighting system.
First flight: 8 December 2000
Primary user: United States Marine Corps
Number built: 62
Produced: 2000–present