That was quite vague and still hard to interpret the trade you mention. But I’ll say generally security benefits from:
a good number of careful eyes on the code
bug bounty programs
audits
red teams
Closed source has the false sense of security pitfall, which stems from the mentality that code secrecy is a protection of some kind. That pitfall is avoidable simply by not using it as a crutch for lacking security. Open source automatically avoids that pitfall. Bug bounties (2) help get motivated eyes (1) on the code (eyes motivated by generous legit rewards, as opposed to the reward of a zero day in the wrong hands). From there, I see no advantage to closed-source here.