Hi dapa0s,
This is a subjective question. My 2019 16" MacBook Pro (CTO from May 2020) does not feel any physically warmer than the 2015 15" MacBook Pro it replaced. The noise levels are about the same when the fans are at full speed, and the 16" seems to kick he fans up to speed less often. I have not experienced (yet at least) anything that I would describe as throttling on my new MBP, but I have seen the CPU temp as reported by iStatMenus (App store version) to hit 100C, at which point the fans kick in full-blast, and then drop it back down to ~64C pretty quickly, rinse and repeat... I did not run iStatMenus on my older MBP, so I am not sure if it hit those same temps or not. Regardless, I have not seen my new MBP slow down because of heat, and the parts of the MB that I touch are never more than warm. The spot between the touchbar and the screen does get pretty hot, but then again, it got just as hot in the same place on the 2015 model.
If you are sensitive to fan noise or plan on using an external display, you may want to consider the 2020 13" MacBook Pro. If you need the performance of the 16", well you don't really have an option. Some folks here have reported better temps and performance with the $700 5600 Pro Upgrade.
Good luck!
Rich S.