[Sidekick]

I used to do ring games and now I do SNGs almost exclusively.

Limit ring games and NL SNGs use a different skillset IMO. I have known people who can do both, some that can do one but not the other. It just depends on the person.

I personally switched from ring to SNGs to try and lower variance and because SNGs are more interesting to me. However, IMO SNGs are more difficult to do well. Some would argue this, but limit ring games are much more standard in how they play while SNGs (and all tournaments really) have a number of other factors that don't come into play in ring games (e.g. blinds, stack size, etc.).

I don't think either is better, but I think some people are more suited to one over the other. I would recommend playing some SNGs and see which you like better.