Fate vs strange is kind of a magic version of Superman vs Batman.
Being doctor fate dumps all of this knowledge and power into your body ontop of whatever you already know and have. You don't need to go and research a spell or look up an incantation or study an enemy. The knowledge of the universe just gets dumped into your mind. And your body gets boosted to natural super human levels without needing protection spells.
Doctor strange by contrast is always studying and researching. Making pacts with demons. Seeking out ancient text. Now strange is amazingly powerful and can contend with fate. It's just that a lot of his big stuff requires prep.