Volla is also (near) EOL hardware afaict so no real difference there:
- 2017: GitHub - HelloVolla/android_kernel_volla_mt6763: Linux kernel source code for Volla Phone
- 2019: GitHub - HelloVolla/android_kernel_volla_mt6768: Linux kernel source code for Volla Phone 22
Unrelated, but noteworthy: Murena Phone, Brax Phone, and Simple Phone are all the same chip, P60/MT6771, from 2018: https://en.wikichip.org/wiki/mediatek/helio/mt6771 :
- hxxps://murena.com/shop/smartphones/brand-new/murena-one/
- hxxps://simplephone.tech/product/simple-phone/
- hxxps://brax.me/prod/host.php?f=_store&h=rob&p=&version