The B variants have a firing pin block. The Shadow variants don't have a firing pin block.
Most hammer fired CZ's also have a half cock hammer position that pulls the hammer off the firing pin for another level of redundant safety. Plus it helps shorten/lighten that first trigger pull. Both safety/decocker B variants are safe to carry hammer fully down or at half cock.
I'd opt for the Sp-01 tactical if I were going to employ a full sized all metal pistol. For carry, I'd look for a CZ PCR, it's a alloy framed CZ Compact with a decocker.
Cheers,
Toby