Difference between Facebook Mobile and Facebook for iPhone?

[HELP ME]

i have the facebook app on my iphone.

when other people post to facebook through their iphones, beside their posts i see "via Facebook for iPhone".
however, when i post on facebook through my iphone, it says "via Facebook Mobile".

What is causing this difference?

I've tried going on facebook through safari, and also, it says "Facebook mobile" instead of "facebook for iPhone".

[Greg]

here is detail about facebook mobile .
read over here in details

http://www.eppleblogs.com/what-is-facebook-mobile.html


and on iphone its just an apps and it works same like