Ardor is a project of nxt, what does nxt do? besides being main chain Why does it exist? Both projects has almost same market cap, I think there is a misvaluetion.
"After Ardor has launched, Nxt 1.0 will remain active and supported. Nxt 1.0 is the giant on which Ardor is built and it will remain running as a core component of the Nxt eco-system, functioning as a complete blockchain solution in its own right, as well as assisting in the development and refinement of the Ardor blockchain platform."
Source:
https://www.nxter.org/nxt-announces-ardor/