Same fund, two price tags. SPY costs 0.09%, VOO costs 0.03%, and that is genuinely the whole comparison.

- Same 500 companies, same weights, same returns minus fees - On $100,000 over 30 years, the 0.06% gap compounds into thousands - SPY survives for traders: deepest options market, tightest spreads - Owning both is the S&P 500 twice, with part of it costing triple; consolidate in an IRA in one trade - Tax treatment identical: qualified dividends, same structure - One reason to keep old SPY in taxable: a big embedded gain you do not want to realize

Compare every candidate against what you hold: Overlap ($4.99 one-time) lines up fees and overlap side by side.