According to my experience in cryptocurrencies and this may also be my shortcoming in BNB coin analysis.
wBNB is Wrapped BNB.
Basically the original BNB is a type of coin from the BEP2 blockchain network, with a wallet prefix like bnb1 ... ... ...
The wBNB in Pancake is a BNB that has been equated with the original BNB with a blockchain network type from BEP20 or Binance Smart Chain with a wallet prefix of 0x ... ... .. .
For the value of the BNB (bep2) and wBNB (bep20) coins, it must be evenly distributed because these two blockchains are well integrated, safe, accurate and fast in terms of price changes.