Similar Position in I-485

What does similar position mean.
Let say if someone started working in ERP and and after couple of years, due to job he/she started working on some other GUI tool say VB/VC or ASP but while filing labour ERP was mentioned on his/her labour.

Now when he/she joins new company on the basis on VB/VC or ASP.

Does this mean similar position or different.

thanks
 
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