Galaxy S6 vs Tab S 2

I am trying to decide to which i should buy, i plan on using it mainly to stream/ download music am concerned mainly about performance and longevity, i feel like the better choice is the s6 but i really want a tablet at the same time pls help.

tablet -

OS Android 5.0.2 (Lollipop), upgradable to 6.0.1 (Marshmallow) - T810, T815

Android 6.0.1 (Marshmallow), upgradable to 7.0 (Nougat) - T813N, T819N
Chipset Exynos 5433 - T810, T815

Qualcomm MSM8976 Snapdragon 652 (28 nm) - T813N, T819N
CPU Octa-core (4x1.9 GHz & 4x1.3 GHz) - T810, T815

Octa-core (4x1.8 GHz Cortex-A72 & 4x1.4 GHz Cortex-A53) - T813N, T819N
GPU Mali-T760 MP6 - T810, T815
Adreno 510 - T813N, T819N

s6 -

OS Android 5.0.2 (Lollipop), 7.0 (Nougat), planned upgrade to Android 8.0 (Oreo); TouchWiz UI
Chipset Exynos 7420 Octa (14 nm)
CPU Octa-core (4x2.1 GHz Cortex-A57 & 4x1.5 GHz Cortex-A53)
GPU Mali-T760MP8

maybe also using it as a bitcoin wallet too - samourai