Yes, the battery times across each BT codecs are different.
AAC works at the lower bitrate and consumes lesser power than the other codecs.
That's the reason why every maker specifies the battery time with the AAC codec.
Please check the link below for more information:https://docs.google.com/spreadsheets/d/1UFNZj07Z-sOSHCwurqOd4KETnK4JUhDcsQrh6Pb3zwg/edit?usp=sharing
It's a simulation result, but there wouldn't be much difference with the real world battery time.
We'll update the full specification of battery time for each codec and use cases, once we fix and confirm the final HW design.
Please note that QCC512x consumes only half of the power than CSR8675 while providing doubled processing power with quad cores.
Assumed with similar HW conditions and use cases, 5K QCC5124 would deliver the best power efficiency and longer battery time than others.