The difference between kernel packages

[rektal]

I use Muon package manager. I am on 6.1.0-8 kernel now.
I found that there  are packages like:
- linux-headers-6.3.1-sparky-amd64
- linux-image-6.3.1-sparky-amd64
and
- linux-headers-6.3.1-sparky7-amd64
- linux-image-6.3.1-sparky7-amd64.

What is the difference between them?

[rektal]

I have installed the newest sparky kernel 6.3.1 but there is an error on start:
wrong shim signature.
I had to use kernel 6.1.0-8 to start using a system.