Should I credit Singapore Airlines flights to KrisFlyer or Velocity if already have Velocity Platinum status?

Hi all - I’m flying return in business (j) from Brisbane-Singapore-Tokyo next month and am uncertain about where to attribute points. Already platinum with Virgin so not sure off the value is there in attributing points and status.

From what I understand, KrisFlyer is different and is more oriented around miles flown and spend to assign status/value? I will be undertaking seem more regional travel this year and can or will use SG if it’s beneficial.

Just signed up for the entry tier for Kris Flyer also.

Any advice would be welcomed!

Kind Rgs,