Hmm, that would only make the situation more complicated and worse. I am pretty sure there aren't that many people who would join it then, trust me. We can't get many people altogether to join this competition, if we divide into 2 different groups, there won't be much entrants in any of the groups.
Also, you can't get good at something without doing anything or practicing. I haven't seen any less experienced people even posting any screen shots in edited screenshots thread, that would only make me think that there either aren't that many people who like doing this or they are not posting their pictures for some weird reason, since by seeing the critics, it's the fastest way to learn something.
Also, I think it's a better chance for the less experienced to be in the same group with experienced since that would only motivate them to get better if they want to come close to any good place. Who cares if you are not winning in the beginning, the most important thing is to participate and improve and if you see that you are getting good results between more experienced people, you will be a lot more satisfied than if you are in the same situation in the less experienced group.
That's just my point of view, if you don't practice, you'll never get good in anything, whining about something won't make your life easier. If you want to be good at something, then just practice, practice and practice.
Anyway, maybe I'm wrong, but for now I won't experience with these 2 groups. I'll see how it works with 1 group.
BTW, I need a good topic to get this competition running again, can't think of anything that hasn't been used already.