Core Insights - The Vanguard Mega Cap Growth ETF (MGK) and the Invesco S&P 500 Equal Weight ETF (RSP) are both U.S. equity ETFs but differ significantly in their investment strategies, with MGK focusing on large growth stocks and RSP employing an equal-weighted approach across the S&P 500 [1][8] Cost and Size Comparison - MGK has a lower expense ratio of 0.07% compared to RSP's 0.20% - As of January 15, 2026, MGK's one-year return is 21.27%, while RSP's is 13.32% - MGK offers a dividend yield of 0.35%, whereas RSP provides a higher yield of 1.64% - MGK has assets under management (AUM) of $32 billion, while RSP has $76 billion [3][4] Performance and Risk Analysis - Over the past five years, MGK experienced a maximum drawdown of -36.02%, compared to RSP's -21.39% - A $1,000 investment in MGK would have grown to $2,034 over five years, while the same investment in RSP would have grown to $1,509 [4][11] Portfolio Composition - RSP tracks the S&P 500 Equal Weight Index, providing broad diversification with 504 holdings, and sector allocations of 16% technology, 15% industrials, and 14% financial services [5][6] - MGK allocates 56% of its assets to technology, 16% to communication services, and 12% to consumer cyclicals, with a concentration in a few large-cap stocks like Apple, Nvidia, and Microsoft, which together account for over one-third of its assets [7][9] Investment Implications - RSP is positioned as a more stable investment option with greater diversification and lower risk, while MGK, despite its higher volatility, has a history of outperforming RSP in total returns over both 12-month and five-year periods [10][11]