Debian 10 with Kernel 5.10 backport -- which version to install?

[t1devel]

Hi, if I understand correctly, I'm running Debian Buster with a Bullseye's kernel's backport.
Which motion version should I install, buster_ or bullseye_?

foo@bar:~$ :~$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 10 (buster)
Release:        10
Codename:       buster

foo@bar:~$ uname -r
5.10.0-0.bpo.9-amd64