I tend to use Ancestry these days when I haven't been able to find what I am looking for with a search on Findmypast.
If I try to do a big general search on Findmypast, like Rosa born Reading 1847 +/- 3, it will usually time out. Ancestry will come up with what I think of as "fuzzy" search results, which will sometimes produce the goods although at the expense of ploughing through a lot of irrelevant stuff. It never times out!
If you want a precise search on Ancestry use the exact option - if that doesn't find what you want untick exact and be prepared to go through a lot of results. I wouldn't want to be without the fuzzy searches on Ancestry.
Anne