Yocto or Ubuntu Core for your embedded Linux project?

Hi everyone. In which case would one choose Yocto over Ubuntu Core and vice versa and why? Share your thoughts in the comments below!

For our top customers, no one run neither Yocto nor Ubuntu Core. Only new customers would try Yocto because of using of NXP chip, but I have not experience any success case so far. The problem is price tag of chip.