In my experience, unless you are casting boring damage spells, rote spells take much longer to adjudicate. Take the D&D polymorph spell. In Fate, this could be a simple dynamic spell -- you gain the aspect "You are an X". Zero time to cast and not hard to adjudicate. If you turn into a mouse, you don't have to look up the stats for a mouse -- you just are one and everyone has a strong concept of whether you can fit through small holes, if you can manipulate an object and what happens when you get stepped on. Contrast to a D&D game where you need to work out a ton of details. So much so that later editions gave up and created lists of things you could turn into (which will still take 5 minutes to look up).
Rote in a system designed for rote (e.g D&D) is better. Dynamic works better in systems designed for a more narrative experience. I strongly feel the answer depends on the system rather than being a global truth.