Usjes,
On the PRB you should be able to check which funds your PRB are in , that could be important because if you are youngish, funds are normally in slightly riskier funds that can grow faster (but riskier) if older you may want the funds in a less risky fund.
Largely getting your money in retirement are similar on PRB or company scheme, there will be some differences but nothing onerous.
By not having all in one pot ,you spread the risk eg if Company scheme collapses you still have PRB and vice versa.
Other factors are things like your age , how much you want @ retirement , realistically will both pension pots give you what you want etc.
Might be a good time to take to a recommended insurance Broker/financial adviser.