What is BTCB vs BTC?

Could you please elaborate on the difference between BTCB and BTC? I'm particularly interested in understanding the unique characteristics and applications of each. For instance, how does BTCB differ from the original Bitcoin in terms of its issuance, transaction speed, and security measures? Also, what are the specific use cases of BTCB, and how does it fit into the broader cryptocurrency ecosystem? I'm keen to gain a deeper understanding of these two cryptocurrencies and how they compare to each other.