The first screenshot looks good. The second one was kind of confusing because it took me some time to realize that the leftmost card is a torrent list. There should be some visual difference between them.
According to me, 'Status' contains things that change continuously after adding a torrent. 'Details' contains properties which are inherent to the torrent eg. hash, name, creation date, size etc. which never change.
Android chooses the layout based on DPs and not pixels. Each phone/tablet is put in a density bucket (mdpi, hdpi, xhdpi, xxhdpi etc.).
I use the landscape tablet layout when there are 800dp available horizontally.
That is why the Omega tablet uses tablet UI, because it is probably classified as ldpi device, and it has more dps available.