Absolute0;
The answer to your question depends upon the level of security you are comfortable with. Given that both the Browning & the Sentry are RSC's, there's no substantial difference in protective security between them. I understand that you already have the Sentry & are contemplating getting the Browning. Where this is going is this; if another RSC type 24 slot container is available at less expense than the Browning, say another Sentry, then go with the least expensive of the two.
However, if you desire to upgrade the security level of your storage from RSC to true safe, then you have some serious decisions to make. I'm going to suggest doing a search under either my handle or 'RSC'. & spend some time learning the what the differences are. In short, more protection = more money.
900F