So I will state it clearly for you - at the moment Connolly must be regarded as the second best striker in the Irish underage set up. That is partly because of what he has done over the past couple of weeks and partly because of the fact that Afolabi and Obafemi haven't been fit. How this will pan out over the coming season we will to wait and see.
As a Brighton season ticket holder, living near Southampton, who has seen a LOT of both teams' U23 matches over the past 2/3 years, due to being family friends with another of Saints' Irish youngsters, I'm better placed than most to assess these players' relative merits.
Only a matter of subjective opinion, of course, but for me there is no chance that either Afolabi or Obafemi will pan out to be as good as Connolly.