Fig takes less fees upfront (in exchange for sharing profits w/ investors), but I think the main advantage is that they use their media connections to help promote your crowdfunding campaign (and of course they only run one or two campaigns at a time) so you may get more visibility. Naturally, this means Fig has a stricter vetting process so it may more work to even get your game on there.
Kickstarter has been around longer and is probably more "trusted" to more people who crowdfund games.
I think it really comes down to how high your goal is. If you're going for a goal of say $10K because you're going to finish the game no matter what then I'd probably say do KS. If you want to raise something higher than the average indie RPG gets on KS, then Fig is probably your best bet.
Kickstarter has been around longer and is probably more "trusted" to more people who crowdfund games.
I think it really comes down to how high your goal is. If you're going for a goal of say $10K because you're going to finish the game no matter what then I'd probably say do KS. If you want to raise something higher than the average indie RPG gets on KS, then Fig is probably your best bet.