Fair question. My thoughts:
1) There's been a history of East African junior runners with undocumented ages which are later found out to be incorrect (lots of prodigious times of 18-19 year-olds who don't improve much later). But let's assume for now George is his stated age.
2) The limelight is a powerful thing, and the Ingebrigtsen family has had a lot of media exposure with the results to back it up. Of course running a 3:56 mile at 16 years of age means that people are going to follow your results.
3) Jakob WON his race and took down a better field than that in Doha. Not only did he win, he crushed the competition. Maybe Centro isn't in form but guys like Chelimo and Jenkins are no slouches when it comes to showing up. Manangoi held on in a well-paced race and lost by half a second.
4) Payton Jordan was at Stanford University and one of the biggest meets in the US, the Doha meet was in the middle of a desert in the Middle East and received a lot less media hype here.
George seems like a great talent, but in a race between the two I would put my money on Jakob without hesitation. No way Jakob couldn't have run 3:35.x in Doha.