Can You Have Two of the Same Credit Card?
Two of the same product is usually limited
Most issuers let you hold only one copy of a specific card product at a time, so you generally cannot have two identical cards. A few issuers make exceptions, and you can sometimes get a second after closing the first, but the same-card-twice scenario is the uncommon case. Welcome-bonus eligibility rules (like once per lifetime) also discourage it.
Multiple cards from one issuer is normal
Holding several different cards from the same bank is routine and often smart: a trifecta deliberately stacks a few cards from one issuer to cover all categories and pool points. Issuers may cap your total credit or number of cards (and rules like 5/24 apply), but multiple distinct cards from one bank is expected.
Personal and business count separately
A personal card and its business version are separate products, so you can hold both, which is a common way to earn two welcome bonuses and more rewards within one ecosystem. Product-changing a card also effectively gives you a different card without a new application. See application rules and how many cards to hold.