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by usr1106 879 days ago
Not a real expert with those systems, but I have used both. I believe buildroot is much smaller (as in much less binaries can be built) than Yocto. Yocto has its learning curve, but there is a lot readily available and you can do a lot more. It's extensible by desgn. You can build basically everything, but not without understanding the principles by just searching a few odd SO answers.

I have used buildroot for an initramfs. If you have configured a kernel before, you get going in an afternoon.