I submitted a paper a couple months ago. I wasn't super happy with the results I published and ended up rewriting major sections of the paper (mainly for clarity rather than content). I got some better results to a point where I was happy with the results. I then submitted it to another conference. I forgot I had submitted to the first conference (partly due to medical issues, partly my fault for not having a system in place considering the issues), thinking that I had not submitted since I got the better results/did the edits. Looking back, the methods aren't that different (mainly hyperparameter optimization in ML that led to better results). How do I address this double submission?
- Withdraw the earlier paper (I'm assuming that's the one you care less about) now
- Withdraw if/when it is accepted
- Depending on how different the papers are, do nothing
You mention you have new and different results and revised the paper significantly. Is it possible that they could be considered separate works?
If not, take your pick of option 1 or 2. I would slightly prefer 1, only because it might be more respectful of the time and effort of the reviewers/conference organizers. You don't necessarily need to give a specific reason, just withdraw. I suppose if you were trying to be as ethical as possible, you might inform one or both conferences of the mixup. I'm not sure who that would benefit though.