well i love the anime-accurate of the figma version..
but there is something about the nendoroid that makes my mind confuse
one phrase. "take one then take the other when you feel something is missing from the other one"
figma and nendo has a lot of differences. from face,accessories, etc...but to be precise, I suggest getting the one you like MOST then try to see if it reaches your expectations..afterwards if you found out that it lacks something that the other one have, go buy the other when you get the chance..most of the time figmas and nendos have different things to show you..also, take note of it's rarity level..since BRS is new, it doesn't mean that it'll be abundant until you decide you buy..there'll be chances that you can't find either of the two you're wanting so be sure you can accept what's availble..
I myself took 2 Mikus..one figma and one nendo..why? here's why..
1)figma doesn't have the nendo's worried face while nendo doesn't have the figma's other faces.
2)nendo can't pose like figma do and vice versa.
3)nendo has the some accessories the figma doesn't have and vice versa.
4)figma can imitate the real ones.
last tip I can give will be..."quote the price"..some collectors choses what thier money can afford..since you like both, saving is your best partner if you want to get both..if you found out that the one you're targetting is more expensive than your second choice, it'll depend on you wether you'll take the detour or just save some more to get the one you really wanted..some shops like GT can reserve items so better try reserving it if you're worried that your favorite item may be gone the next day..