WCF/WF - single proxy for multiple web services

I have multiple web services to be accessed in a single solution.All the web services have similar method signature but the implementation is different.Now to access the multiple web services do i need to create multiple proxies in the client or a single proxy would do?if  it is possible to use  a single proxy then how to identify the response obtained from the specific web service?

Type sharing: .NET now recognizes when two web services use the same complex type and generates only one client-side class. Best of all, because both proxy classes use the same types, you can easily retrieve an object from one web service and send it directly to another.