Help-working on phone but slow on tablet?

[TkSilver]

The Tab A does not use a Tegra 2, but Samsung's naming of their tablets is insane.

The 7420 has 4 2.1 GHZ A-57 cores and 4 1.5 GHz A-53 cores along with a GPU that has 8 "shader cores" (though a slightly older chip
vs
the 7870 has 8 A53 cores 4 at 1.6 GHz and 4 at 1.0 GHz along with a newer GPU but it only has 2 "shader cores"

Basically the S6 edge has a faster processor and an older but much higher performance GPU while the Tab A has a slower processor and a newer but cut down GPU. So on the Tab A you will either need to reduce settings or live with lower performance on demanding titles.