How To Figure Out Songs By Ear On Guitar! feat. Nik Nocturnal

I quite often get asked for tips on how best to approach learning unfamiliar songs by ear, so I thought it'd be pretty fun if I gave you all a first-hand insight into how I go about transcribing. To do this I asked fellow guitar Youtuber Nik Nocturnal to join in the antics and tasked us both with writing a short, 30 second-long piece of music for the other to figure out in under 30 minutes!

Whose ears will come out on top??