If you can afford the $400 increase in price, go for it.
I have 16GB on my 16", I had to buy it to WFH and couldn't wait for the BTO configuration. Found a really good deal on the 8 core model and got it. I have a really good machine and memory pressure is usually low, but sometimes I see 1 or 2GB of swap being used.
If I had time to configure the laptop and wait for the longer delivery I'd upgraded to 32 and to keep the cost down I'd have picked the slower CPU.
I have 16GB on my 16", I had to buy it to WFH and couldn't wait for the BTO configuration. Found a really good deal on the 8 core model and got it. I have a really good machine and memory pressure is usually low, but sometimes I see 1 or 2GB of swap being used.
If I had time to configure the laptop and wait for the longer delivery I'd upgraded to 32 and to keep the cost down I'd have picked the slower CPU.