OPR VEX Via vs DB

Does anyone know why the OPRs for the teams at worlds are different in the vex via app vs vex db?

I’m unsure about this. All that I can assume is that Via must do something with DQs to calculate OPR / DPR? Or that they only calculate it once each team has played the same matches? I don’t know, I haven’t changed the OPR calculations for a very long time on VexDB.

Ok thanks