Has anyone ever played both Th 17.5 Sunken Fossil World And Luna nights?

hello basically i just sold all my steam trading cards and got around 12$ from it ive been wanting to play luna nights for a while and i finally got the money to buy it but i randomly found th 17.5 (Sunken Fossil World) on my yt reccomendation and it looks super similar to luna nights (well not really its more similar to hero of ice fairy i guess) and now im interested to try that too xD but currently i only have the budget to get 1 which one do you guys think i should get? from gameplay perspective which one do you guys think is more fun? also which one has longer playtime? i know i can look at letsplay and just determined the playtime from there but i might accidentally spoiled myself of the story xD