Question about aspect ratios...

[Mocorongo]

I noticed that while watching Star Trek: TNG (not only that release, others in the same AR too) Blu-ray, my iPAD shows the picture like that:

Aspect Fit (this is the option that is configured by default in my iOS player)



As you can see, black bars on all sides. And the iPAD uses a 4:3 screen.

Notice the fingerprint smudges on the left side. Now look what happens if I select ASPECT FILL:



Picture is zoomed, however it doesn't seem to cut anything from it. This is what Star Trek: TNG should look like without any need to select the ASPECT FILL option.

This is, however, how DUNGEONS AND DRAGONS (1983 - DVD) looks in my iPAD:



Using the default ASPECT FIT option.

Please enlighten me, I am missing something... since both of them are in 1.33:1, why is that Star Trek: TNG looks smaller and requires me to apply zoom every single time?