It will default to whichever you used last, and it's a single tap to switch. I'm not sure how it could be better designed. Two different search buttons seems li

It will default to whichever you used last, and it's a single tap to switch. I'm not sure how it could be better designed. Two different search buttons seems like a bad idea. Ignoring your last-used to always focus on Apple's preferred option seems like a bad idea. Last-used with a single tap to switch seems ideal to me.