^ Hard to say haha.
I guess, technically, your chances are higher. Since with the fanspace lotteries, you're only competing against other fanclub members for that specific date. Whereas with the general lottery, you're competing against everyone.
She also usually gives her fanclub members more opportunities to get tickets via additional lotteries. So if you didn't get tickets the first time around, you could always try again.
The membership is only like $50 for the entire next year (and it's decreasing every month). So I think even if it's only a slight better chance, it's worth it if you really want to go see her.
I want to imagine her upcoming tour will be easier to attend, since they'll be at domes, but it's also her retirement tour so I guess competition will be insane anyways.