Both ETFs track the S&P 500, but they serve different investor needs. One minimizes long-term costs. The other emphasizes liquidity when execution mattersThe main distinction between SPDR Portfolio S&P 500 ETF (SPLG) and SPDR S&P 500 ETF Trust (SPY) lies in SPLG’s lower expense ratio, while SPY stands out for its immense scale and trading liquidity.Both SPLG and SPY aim to mirror the performance of the S&P 500 Index by holding large-cap U.S. stocks across all sectors, serving as core building blocks for div ...