To answer the question. Yes they all flash, though some are a little faster than others. But not a lot faster.
As to whether the flash is a problem to you in particular, that is up to you. Most people get used to in a short time.
I'll grab a tree limb and lean out over a cliff to enjoy the view. My wife looks at the floorboard as we drive over a bridge.
It's all up to you. If you think that you can't get used to it, you won’t. Buy something else.
Sometimes too much to drink is barely enough. - Mark Twain