Yes, Weebsphere administration and Websphere development both are different things.If you are talking about websphere administration then
you should know the below things.
1- How to deploy applications at Websphere server.
2- How to do Load balancing in Websphere.
3-How to do Clustring in Websphere.
4- How to create Profiles in webshpere
5- how to create Nodes in websphere.
etc.
If you are talking about Websphere development then you should know the following things.
1- How to use
IDE like - RAD,WSAD
2- What parameters support Websphere.
etc.