[sumi tinku]

Someone tell me the difference between Lumia 940xl and 950xl...

[xboxonthego3]

There never was a 940xl.. The 950s both 950 and 950xl were rumored to be named 940 at first. So the 940xl is the 950xl.

[sumi tinku]

So... You are telling 940xl and 950xl are same...

[Pete]

Not the same as such, but they do appear to refer to the same handset. When rumours are released/made up, model numbers are often quoted. Sometimes these are a product of assumption, sometimes they're internal to Microsoft. Whatever the reason, information taken from leaks and rumours shouldn't be regarded as fact until there's an official announcement.