Yeah, it’s most likely caused by Google profiling OP and showing what it thinks OP wants to see.
Out of interest, I just entered “Reddit vs” into DuckDuckGo (which is a search engine that doesn’t profile its users, and it gets most of its search results from Bing). I got the following search suggestions:
reddit vs quora
reddit vs twitter
reddit vs discord
reddit vs anime
reddit vs facebook
I can’t believe that anime made the list but Lemmy didn’t lol