Windows 8 RTM - what is it?

[BoomAM]

Afternoon all,
Odd question to ask, as im fairly sure i know the answer.

"RTM" versions of windows are basically the finished product are they not?
As in, if MS release in 6-12 months time W8 SP1, it will work as intended on a RTM copy?

Reason for asking is that im trialing whats labled as "W8 final" on the MS site here at work, but the build number is RTM and the help files in it refer to "windows release preview".

Just curious as to whats what.

Thanks in advance.

 

[BoomAM]

So...like i said.

Im also trying to work out the difference between English & English international...as the language can be changed at a later date anyway!