Skyteam members have different rules and different names for their extended legroom seats. On KLM, it's Economy Comfort and only status holder gets comp access as noted above (also, unlike DL C+, it's not a separate fare class on KLM). On Virgin Atlantic, it's called Economy Delight and there are no comp upgrades to seats for either status holder or companion. Like DL C+ seating, Economy Delight seats are sold as a separate fare class.