Difference between RO 2 Digital Deluxe & Standard Edition

[Rango]

RO 2 Digital Deluxe Edition adds the following extras on top of the Standard Edition:

• Day 1 Unlock of the Elite Assault Weapons (MKb 42(H) and AVT-40) and Semi Auto Sniper Weapons (SVT-40 and G 41(W).
  
• Team Fortress 2 German and Russian hats ("Genuine" if bought during pre-purchase).
  
• Two new characters for Killing Floor - Russian and German Soldier Re-enactors.

[Rango]

Another good subject :

What should you buy ? Red Orchestra 2 or Rising Storm ?