I see no Spacebattles on that list for some insane reason...
But honestly not counting Quora because that's the equivalent of a cheat code, it's between SB and VSB for myself.
VSB tends to go WAY overboard with wanking feats to unbelievable degrees either based on bad calcs through manga pages, taking things stated and stretching them way past the endzone and into the next timezone and act as if they are right in that regard(Or ends up acting as bad as SB when it's something they don't like).
SB tends to go the opposite direction with a good number of series but also plays so loose with their rules, they end up completely ignoring them when it's "convenient". Their calcs are legit awful past the rare few and they don't do VS. debates, they almost never use their Meta-Thread and thus feats can literally come from nowhere and people will just agree because "They want that side to win" with no real fact checking and their holier-than-thou attitude is absolutely grating to witness.
Both sites Moderators tend to be absolute assholes and abuse their authority for any and every reason while allowing their "Golden Apples" to reign free.