Sparking super vegeta vs sparking super saiyan trunks (youth)

They're pretty similar, so it'll depend on who else you have on your team. If you have Kid Goten too, Goten+Trunks make for a great hybrid saiyan team. If you have better Saiyans overall, then Vegeta is the better choice.

Depends of the team, if u run hybrid saiyan pick Trunks, if u run saiyan team run Super Vegeta.