SPX vs OEX OPTIONS

[Marcelo Martinez <marcelom@xxxxxxxx>]

Can anyone tell me what the difference between OEX and SPX options in
terms of the bid/ask spread and also volume. My broker tells me that the
OEX has narrower spreads because of the higher volume , but if you look
at the open interest and daily volume it appears that the SPX options
are higher volume. Which is correct?

Thanks

Marcelo