What is the distinction between less developed and emerging markets?

What is the distinction between less developed and emerging markets?
Emerging markets are those developing countries that show signs of advancement in its financial structures - banks, stock markets, regulatory bodies, and reached a certain level of maturity in terms of depth, breadth and liquidity in its financial structure and economy as a whole. The best and most definitive lists fo emerging markets are those by investment banks such as MSCI index or the list by IFC (international finance corporation), part of the world bank group. Less developed countries are those that have not yet reached this stage of financial and economic development.