Should I apply an IB account at ibkr sg or ibkr llc site. Any difference and whats the pros&cons?

If you want to buy shares from singapore and the rest of the markets offered by interactive brokers, applying for ibkr sg would be good. If you just want to buy overseas shares, then either is fine i think. It used to be just ibkr llc because there was no sg headquarters for ibkr, and due to regulatory issues, ibkr llc cannot be used to buy singapore shares. BUt now there is a sg office and they can offer this service i think! hope it helps!