"Emerging" markets will tend to be more volatile. They'll tend to move around more. When emerging markets become "submerging" markets, you can make great money on the short-side.
I am in India and I find that they give fabulous returns as they are very volatile and go much faster as well as come down much faster than US markets.
With regard to emerging markets, most are just NOT accessible for intraday or short term trading for most international investors unless you happen to live in that country. That leaves ADR's as pretty much the only alternative at the moment. There really aren't that many liquid alternatives. Maybe futures on a couple of volatile markets.