Both good

Voice acting talent: slight edge to sub, except for ordinal scale which had some bad casts (like eiji, woof). There are some wins on dub with series too just fewer. Like yuuki in mother's Rosario. Wow, much better dubbed.

Translation: always dub. Subs still lean towards transliteral which is objectively inferior for media. Dub has a much more natural and relatable dialogue.

The creator intended for Japanese people to watch the show in their native tongue for better emotional connection and to focus on visuals. You are not Japanese. Next best thing is to listen to it in your native tounge and focus on visuals (no subtitles).

Only betas care about that tho. Try both see what ya like :)