Here's a look at the race to topple $SPY, this is the % of SPY's assets that each ETF has. While $IVV has 93%, $VOO eats up share faster, nearly 10% a year which puts it on pace to pass $SPY in 12mo. My take $IVV and $VOO both pass $SPY around same time but $VOO ultimately pulls away long term bc it takes in more cash and has the MF migration tailwind that $IVV doesn't