Heres the difference:
ETF:
1. ETFs are flexible investment vehicles, they appeal to a broad segment of the investing public. Passive investors and active traders alike find the features of ETFs attractive.
2. Passive institutional investors love ETFs for their flexibility. Many see them as a great alternative to futures. For example, ETFs can be purchased in smaller sizes. They also don't require special documentation, special accounts, rollover costs or margin. Furthermore, some ETFs cover benchmarks where there are no futures contracts.
4. Active traders, including hedge funds, love ETFs for their convenience, because they can be traded as easily as stocks. This means they have margin and trading flexibility that is unmatched by index funds. Ironically, ETFs are exempt from the short sale uptick rule that plagues regular stocks (the short sale uptick rule prevents short sellers from shorting a stock unless the last trade resulted in a price increase).
Index Funds:
Passive retail investors, for their part, will love index funds for their simplicity. Investors do not need a brokerage account or deposit with index funds. They can usually be purchased through the investor's bank. This keeps things simple for investors - a consideration that the investment advisory community continues to overlook.
Conclusion
As with many financial decisions, determining which investment vehicle to commit to comes down to "dollars and cents". Given the comparison of costs, the average passive retail investor will decide to go with index funds. For these investors, keeping it simple can be the best policy. Passive institutional investors and active traders, on the other hand, will likely be swayed by qualitative factors in making their decision. Be sure you know where you stand before you commit.
You can read more here:
http://www.investopedia.com/articles...FIndexFund.asp
And for the Singapore index funds... i don't live in Singapore so i have no idea about it.