I know my Streamdeck layout by heart and can trade without looking at it, but it comes down to personal preference. Andrew uses hotkeys. I like being able to have a visual fallback and to have a ton of hotkey combinations for various things, without having to memorize it. It has cut down my hotkey "errors" that I used to get. I probably have around 100 different DAS hotkeys, trying to memorize that would be a nightmare.
I'd say StreamDeck has an advantage when it comes to traveling if you don't trade on the same keyboard, as it's smaller and easier to travel with, thus allowing you to keep the feedback exactly the same no-matter where you are (e.g. switching from desktop keyboard to laptop keyboard can be like relearning the hotkeys).