I never wrote about a competition between them.
I wrote that covid "also" mutates. I think 8 "notable" variants in 1 year is for me "a lot".
and in just 1½ year we got a variation that is so different that we need a completely new vaccine.
that means, we could get a new variation in ½-2 years that is completely different again.
and since omicron is spreading around very fast, almost unnatural fast, it also helps generate mutations faster, even if the virus is not as fatal, a mutation could be again, and we are back again with a delta-version or worse.