The constraints for writing with a quill on expensive parchment were the same in Northern Europe and in Southern Europe.
Despite that, during the "Gothic" time, the Gothic writing style preferred in Northern Europe (Textura quadrata, or Textura sine pedibus for the most expensive manuscripts) was clearly different from the Gothic writing style preferred in Southern Europe (Rotunda), the Northern one replacing all curved lines with broken segmented lines and having taller and narrower letters, while the Southern one preserved some of the curved lines and had wider less tall letters.
The same style differences could be seen in the architecture of expensive buildings, like churches, so there is little doubt that it was a difference in taste, not a difference caused by material constraints. The material constraints only caused both styles to use condensed bold letters, together with a lot of abbreviations.
Despite that, during the "Gothic" time, the Gothic writing style preferred in Northern Europe (Textura quadrata, or Textura sine pedibus for the most expensive manuscripts) was clearly different from the Gothic writing style preferred in Southern Europe (Rotunda), the Northern one replacing all curved lines with broken segmented lines and having taller and narrower letters, while the Southern one preserved some of the curved lines and had wider less tall letters.
The same style differences could be seen in the architecture of expensive buildings, like churches, so there is little doubt that it was a difference in taste, not a difference caused by material constraints. The material constraints only caused both styles to use condensed bold letters, together with a lot of abbreviations.