I think they are both very good in terms of mould, but JC Wings has been printing the cockpit wrong sometimes, which is very unpleasant and it really spoils the look of the aircraft for me. SQ has a brand new version with the correct wing-body joint, which was wrong in the early versions, but even then it was not too dramatic in my opinion. SQ has flaps down option which look great, and more details in printing. Overall, at the moment I would personally prefer SQ wings