Why is FB and GOOGL EBITDA so different?

So if I understood correctly EBITDA is a metric to compare apple to apple. So FB and GOOGL are both companies who only get revenue from ads MAJORLY.

FB has 95B gross profit and GOOGL has 146B gross profit.

FB has 54B EBITDA and GOOGL has 91B EBITDA.

Why is the difference so big? Are the Billions of Metaverse reinvestments calculated into this and google does not reinvest as much as META?

So if i understand correctly revenue-cost of revenue is gross profit.

Gross profit- (minus)reinvestments and dividends/share buybacks is EBITDA

And EBITDA -(minus) (interests+tax+depriciation+amortization) = net income

​

If I understand correctly then how do you see where the money went between gross profit and ebitda?