They both have their advantages and disadvantages. DLM is way faster with leaks but doesn't give credits. Also they have an interactive community and thus far more deck recipes. But their Tier List is based on their tournaments and is thus not that accurate for normal games.
You are committed a mistake. GameA actual a trusted source because she gives proper credits to the leakers/datamine.
Time speed doesn't mean anything if you just at the end will NOT credit the source, that is really dissapointment.
While I use gamea on both duel link and wotv, I find it funny the comment section filled with player that can't even read and those who started a cringey drama.
Being anonymous surely bring some weird being together.