u/Empty_n_become_wind

I'm landing on Lombok and departing from Bali this April for 3 weeks.I'm confused about the B1 & C1 visa. B1 is e-Visa on arrival with single entry for 30 days whereas C1 is e-Visa with single entry for 60 days. Is it Ok to apply for B1 which is half the charges of C1? I just need confirmation from someone who's recently been there. Confused about whether e-Visa is better than e-VOA or if it's the same for someone who'll be there for 3 weeks