change my cpu, intel or amd high end ?

hello everybody, all is in the title. I will probably change my cpu and i'd like to know if it is better to change for an intel or an amd cpu like the 5950x or 5900x?
i am confused with the fact that it will be better with a single core performance or a 16/32.
Can u help me and developp your answer please?
(xcusz my english, i am french)