4.10 FBSD vs 5.x FBSD

[Laszlo Antal]

Hi,
I am using 4.10 FBSD. Just started few months ago. My question is what 
are the major differenc
beetwen the 4.10 and the 5.x release??
I am reading this mailing list every day (better than any book I got) 
and I see that most of the questione is about 5.x release and just read 
today the 5.3 came out.
Do I need to upgrade to 5.x ? Is 4.10 out of date?

Thank you

Laszlo
Laszlo