First off I'd like to point out you are asking to compare a family of distributions to a kernel. Not quite a 1-to-1 comparison.
Sustinctly: BSD licenses are more permissable for developers, GPL licenses (aka Linux) are better at preseving freedoms past developers have handed down to us.
As a non-developer end user, both are about the same, although because of the nature of the GPL, you can find a wider bredth of free software for it in 2023.