As Oscar has spent most of this year competing in clay-court futures, that experience definately gives him a big advantage when it comes to the junior circuit. He beat Marcus Willis I believe in the National U18s.
Badderley is 17 and ranked 232 in juniors. This year his best results have been winning a G4 in Barbados and making a semi in Trinidad and Tobago. However, he's never played any tournaments on the men's circuit. I reckon that Oscar can cause an upset if he plays at his best given that he's beaten guys ranked around 900 ATP in futures qualies.
Chris' opponent is also 17, ranked 213. He's played a couple of futures qualies. His best result this year was winning a G4 in the States. Tough one for Chris, I don't think he'll win but hopefully I'm wrong