It's not a question of which one "I" prefer. It's about what you prefer. Either method of creating a break angle over the nut works.
Personally, I always use a scarf joint for my head stock. Is it better? I doubt it, but I like the looks. I use a 12~15 degree angle since that is common on factory made acoustic guitars.
Don't over analyze it. Look at them both and decide which look you like better. In the end, you can't really make an incorrect decision.
Done both. I would say the upper one is more classic cbg, the lower is more traditional instrument. Also when I do the lower one normally I put the purple part on top. No veneer needed ( it is already usually to thick) and the joint is covered by the fretboard.
Most folks do the cutout one for the first few gits, then get the itch to try a few with a scarfjoint to challenge their skills.
Another thing to keep in mind no matter which method you choose it that most (Gitty) tuners are designed for 1/2-5/8" thick headstocks. Don't make it too thick.
If I'm building a down and dirty(basic) I use the top one. For the custom or the ones I charge more for I use a scarf joint! "No rules"!
thank you a lot for the infos! I think i will try the cutout for this build an a scarf for the next.
And thank you for the tip with putting the pink on top.