How do you value startup dynasty picks vs redraft

0.5 ppr, 2 flex, 1 qb, 1 TE , 2RB, @WR and no dst/k

Trying to figure out redraft vs dynasty startup value of picks for trading

Age and contract years hold weight in dynasty but not so much in redraft. So in redraft players are worth more now if they have opportunity to score more fantasy points this season. In dynasty you are playing for the future as well as for this season so young and upcoming players like Metcalf may hold more value than older players like Julio or AJ Green.