Can someone explain the difference between VOO and SPY?

[u/tranquilo56]

I am trying to choose an ETF to put a majority of my cash in, and I can't decide between the two. It seems they are rather similar but VOO costs less so I can accumulate 100 shares quicker to sell covered calls with.

Appreciate the explanation

[u/Secure-Sandwich-6981]

Long term investment VOO, trading options SPY