"Favor Ping Time" or "Favor Bandwidth"?

check with like fast.com - it shows how your ping time is affected by your upload. When playing online games, esp with voice, your upload can sometimes make your pings higher, like if you are using / sending voice. setting to 'favor ping' should throttle your uploads to a point where it won't affect your ping, and your uploads should spike less.

So, I'm in doubt about this setting. I do many tests with the Speedtest app (I put Speedtest app to the highest priority in cfosspeed) and I seem to only get maximum download speed results of my 300/30 Mbps (download/upload) fiber connection when I set cfosspeed to "Favor Bandwitdth". While my ping doesn't seem to be affected when I set cfosspeed to "Favor Ping time" (it always alternates between 6 and 7 in the tests) but the download speed results go significantly down sometimes in this "Favor Ping time" mode. So I ask, is it better to put cfosspeed in "Favor Bandwidth" mode?

Sometimes I play online on games with servers that are very far from where I live, in such scenarios which mode would be better? Thank you.

Note: the tests are done on a wireless 5Ghz connection (N/AC mixed mode) with MU-MIMO and explicit/implicit Beamforming activated, with a TP-Link Archer T4U adapter (v3.20) and an Asus RT-AC59U router, on a Dell Inspiron 14R 5421 with i7, with Windows 10 Pro 2004 build (all updates applied). Cfosspeed is always on the latest beta version (right now 11.05.2456).