I did say I would stop if someone else picked this up with Vivid subs.

I haven't compared the video wise so am not sure if one is better then the other.

But if people want both subs (for whatever reason) then I don't mind making patches for them.

Or someone just wants Doki's release (with Vivid's subs) because it's smaller.

True and strange: It seems preview pictures are randomly assigned to these two or more picture archives, some of which use jpg (imgur) and others use png (imageshack).  This makes video comparisons between versions of shows randomly possible or impossible, and meaningless without taking this into account.

I guess the preview pictures were meant to serve a different function.

Nice catch, Anon.  I recommend you be promoted to the login of "Anon-Prime", chief of the Anonymi.  

Screens here where not meant to show the quality, just what the show is aproximately about.

Based on past discussions, I believe all the previews used to be png here.  I think imgur may have changed policy on us.

It will tell you something about the quality. You can see if the image quality is clear or not (like vhs vs dvd/bd). You can also see bleeding (one color bleeding into another) & banding (cause by incorrect color bit depth if I remeber correctly). Gamma can also be seen (too bright vs too dark). And my fav aspect ratio. You just can't see a true one-to-one image quality and even if you could please remeber these frames are in motion (what does that mean? Well I'm not going to go in to it).

Another thing is we don't know if it's a screenshot or frame extraction and there is a difference between the two.
A sceenshot will be based on your computer display settings were an extraction will be just that, data covered from the movie file (one frame) to a still image file. My guess it's the latter.