Shimano 2x12 speed virtual gearing?

Hello All,
So just received my New Zwift Ride frame and I’m wondering if anyone can help me figure out what is the difference between choosing Shimano A and Shimano B gearing? My Canron has a 12 speed Di2 gruppo and I am just trying to get that same feel for the Zwift Virtual Gearing. Can anyone help me with this please?
Thanks,
Marquis

I think it’s down to which button shifts up or down.

Shimano-Style A:

  • LS1: Shift chainring up.
  • LS2: Shift chainring down.
  • RS1: Shift cassette up.
  • RS2: Shift cassette down.

Shimano-Style B:

  • LS1: Shift chainring down.
  • LS2: Shift chainring up.
  • RS1: Shift cassette down.
  • RS2: Shift cassette up.

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