As to CPUs, right now with the 13rd gen, the ratio performance/cost is in favor of Intel - unless maybe you target the low end of CPUs, for which AMD has a slight edge.
Be aware that the 13rd gen tends to be pretty power hungry though.
For this, I like the XY scatter diagram on:
https://www.cpubenchmark.net/cpu_value_available.html#xy_scatter_graphThis gives you a very quick overview of the relative price to performance ratio of quite a lot of processors.
I'm still hobbling along on an i5-3570, but the release of the 7000 series Ryzen has me tempted.
Why tempted? The i5-3570 has a PM rating of 4670. That is plenty for mail, internet, office and most other day to day applications.
The Dualcore I used for about 12 years had a PM of only 1500 and that was getting a bit sluggish in the en. After that, I used a machine with a PM of around 3000 for about a year, but only because someone gave me one for free. I would still be using that one, if it was not for a combination of two factors. 1). I had been longing for a 107cm 4k monitor for several years, and those PC's were too old for that. 2). The root partition of the Linux I was running back then was installed on the last partition of an SSD, and it ran out of space. Increasing the last partition in size is a bit troublesome, so I was thinking about wiping the SSD and re-installing everything. But I do not like PC maintenance and I did not want to spend a day to do this on that old hardware. That was the final nail.
Re-installing everything on my new PC was a breeze though. I thought it would take about a day, but in the end it just took a few hours. Installing Linux Mint was maybe 10 minutes, and because I use Open Source software exclusively, installing all my other software also was quick. No messing with license files, entering long weird numbers, online activation or all the other mess that some people are apparently willing to put up with.
Some time ago a brother of mine was visiting, and he wanted to show me something with a gadget (with ESP32) he made. He wanted putty to put in the network credentials and he asked me if I had putty installed. I said "yes", he said "start it then", and I did a "sudo apt install putty", and had it running about 10 seconds later. He thought it was not fair, but I just shrugged my shoulders. The important thing is that we could just continue with more interesting things after an very minimal delay / interruption.