FatFork has got it right. While, these are suspicious circumstances there's just not quite enough evidence to link the two. However, anything that these two users do in the future, could potentially link them, and confirm the suspicious here.

Plus, if they start offering services or try to join a signature campaign a good signature manager will do their research, and likely find this thread, and take it into consideration. So, I don't consider posting the thread detrimental to catching them if they're alts or bought merit. However, I don't think there's enough compelling evidence to link the two accounts either.