Can someone explain the difference?

[Werner_E]

In another thread there was a WS posted with a strange effect. Two variables with the same name are declared, all have the same style (variable) but nevertheless they are different. The red highlighted variable is the strange one, I can't type it, just copy and paste.

Can anybody explain whats going on here?

[Werner_E · Accepted solution]

Found it out myself - the poster has used Greek letters (for A and also for E)!!

Didn't spot the difference.