Voice correspondences between ChatGPT and Realtime API

In the ChatGPT app, with the advance voice mode, there are the following voices available:

  • Arbor - Easygoing and versatile
  • Breeze - Animated and earnest
  • Cove - Composed and direct
  • Ember - Confident and optimistic
  • Juniper - Open and upbeat
  • Maple - Cheerful and candid
  • Sol - Savvy and relaxed
  • Spruce - Calm and affirming
  • Vale - Bright and inquisitive

If I’m not mistaken, the advanced voice mode is built with the Realtime model:

There are 8 voices available for use with the Realtime API, which offers the following voices:

  • alloy
  • echo
  • shimmer
  • ash
  • ballad
  • coral
  • sage
  • verse

My question: Is there a correspondence between these two lists and why are they different?

Thank you in advance for your reply!