Anybody know/measured differences in EGT temperatures in runner vs collector vs O2 housing?

From what I have read, EGT reading in the collector read upto 200F higher than in the runners

I have also read that post turbo can be 200-400F lower than pre turbo (not sure if this is compared to a runner or collector)

Seems like with all the different gauges & probe locations, comparing EGT becomes as challenging as comparing dyno figures

So, if you have solid data regarding temp differences between runners / collector / post turbo at the O2, please reply...