date and time, get newest (latest) from two dates

[r0n]

I read in the following topic-link about using the '>' operator to get the newest file.
getfile newest

If I try it, it sometimes gives me the desired result and sometimes not.
(it's a bit strange, I can not explain why).

Does the below approach which I took, relates with the explanation in the link above?

Macro Macro4

Code:

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Dir dir_a
if dir_a.dir(source_pth 1)
,DateTime a=dir_a.TimeModified

Dir dir_b
if dir_b.dir(full_target_pth 1)
,DateTime b=dir_b.TimeCreated

if(dir(full_target_pth 1)&&dir(source_pth 1))
,if(a>b)
,,backup_or_restore="backup"
,if(a<b)
,,backup_or_restore="restore"

If the above approach is correct, then can I assume (?) that everything on the LEFT side of the > operator is newest (newest date/time).
So from the above example a would be the newest date in this situation ? :

Code:

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if(a>b)