Alejandro Lieber wrote:

Thank you Jim for the explanation. Sorry I wasn't more specific.
I was refering to the difference between receiving and transmiting gain.

The gain effect is the same, but for a lot of radio applications, gain
is important on transmit, but less so on receive, where good back/side
performance (e.g. low gain in undesired directions) is important.

That is, my transmitter doesn't care about a strong interfering signal
from a different direction, but my receiver sure does.