Why not buy a lightly used MBP16 from someone switching to an M1 Mac?
The 11th Gen Intel CPUs are a big improvement from the 9th Gen.
ATP is a Windows executable and runs on macOS Intel through WINE and takes a performance penalty for that. I'd be willing to eat that on an 11th gen Intel CPU but not on the ninth gen.
Geekbench 5 for the 2019 MacBook Pro 16 with i9-9880HK is 1,090 for Single Core and 6,835 for multicore. The score for the i9-11980HK in the Dell XPS 17 is 1,659 for Single Core and 8,993 for multicore. So there are significant improvements in performance that you'd expect from a die shrink.
That i9-11980HK is slightly slower in single-core than the M1 but significantly faster in multicore. I expect that M1X multicore will be around 14,000 and nothing else is going to touch that but the problem is multiple software translation/emulation layers does cripple CPU performance. For reference, the AMD Ryzen 5900H has Single Core score of 1,519 and multicore score of 9.018.
tom's guide said that they got over nine hours of battery life out of it which matches their rated battery life. My guess is that M1X will get over twenty and I don't think that any x86 laptops with even half the performance can touch that. But I'd be happy with nine hours. At some point, ATP and ToS will have Apple Silicon solutions.
A review by The Everyday Dad says that the Vapor Chamber cooling system keeps temperatures around 75 degrees at 100% CPU. I prefer my systems to run below 50 degrees but I don't ever run my systems anywhere near 100% to keep them cool.
One last note is that I can run virtualized macOS on Windows or Linux systems so I have access to the programs I have that only run on macOS. So I can be on the road with my trading programs and macOS applications as well and wouldn't have to bring two laptops.