TGIF: Are store-brand and designer-brand watches the same?

Sometimes while messing with watches and changing batteries, you start to notice something.  For example, the movements of these two quartz watches are very similar in size, shape, and form.  One of the watches is from an exclusive designer brand from Watch Gang and the other watch is a generic quartz watch from Target or Walmart.  The designer watch retails for around $200 and the big box watch retailed for $20.  The designer watch did come with a much cooler stainless steel case and an internal bezel that rotates.  It's an interesting watch.  The big box watch case in a much more generic base metal case.  But, still, the similarity bugs me.

Beneath the case, are these the same watch?

A generic quartz watch from a big box store & a designer watch

On one hand, the similarity in movements presents an opportunity.  I messed up the movement of the designer watch when a battery change went awry.  So, maybe I could swap the movement of one watch into the other.  On the other hand, are designer watches and store brand watches almost exactly the same when you pull the caseback off?

Maybe it's a good thing that many watch movements can be found in similar shapes and sizes? It might make repairs and replacements easier.  Speaking of replacement watch movements, did you know that there are many watch movements sold on Amazon? Click on the link to have your mind blown!  I might try to build my own watch or, at least, repair some of my broken watches.