SPX vs SPY options performance…an example

Can anyone please let me know what am I missing? is the difference in performance is a result of dividend risk?? what am I not seeing?

for the sake of discussion: bought a put at the low and sold at the high in both SPX and the ETF that is pegged and mirrors its performance….the SPY:

$1000 SPX 3800 put bought at 0.85 and sold at 19.59 = $23,047 (CHECK TODAYS EXP)

$1000 SPY 380 put bought at 0.85 and sold at 19.59 = $14,583 (CHECK TODAYS EXP)

THANKS!!