PhD Length: are shorter PhD degrees (from different countries) valued differently in other counter countries where PhD Is a longer process?
As far as I have ever seen, the length of your PhD program is irrelevant as far as considerations of future employers, etc. People (in academia) will mostly look at your publications, and possibly reference letters and reputation of your supervisor(s)/university. In particular, in all cases I know of seniority/age limits for grants count from date that your PhD was issued. (The only exception I have seen to this is the seniority limit for junior (W1) professors in Germany, which is some cases include your experience during your PhD, but this is state (Bundesland) dependent I believe.)

In some cases, your time as a PhD may (or may not) count as relevant work experience. In Germany, for example, this can factor into the determination of your salary scale, and the length of time that you can be employed under fixed term contracts.

Since one of the primary criteria by which freshly minted PhDs are judged for post-doc positions, is their publication output, as short PhD program can put you at a competitive disadvantage compared to PhDs coming from longer programs due to have less high quality publications out by the time you are applying (which also will have had less time to make an impact). A knowledgeable selection committee may account for this, but that is not guaranteed.