Both are great. Either way, you can’t go wrong.
Oblivion has a really great snare that stands out from the rest of snare samples you can usually hear : the Mapex Brass Snare. Incredible sound.
Crush is a bit younger and has more variety with its snares but they are more conventional, which can be your purpose, and they will always serve. Now, Crush has more cymbals + splash and china stacks, that Oblivion doesn’t have.
So I’d say, personally, Oblivion for the uniqueness of the Mapex Brass Snare, or Crush for the variety of cymbals and snares.
For the kick and toms… No major differences, they are shaped for the same purpose. Maybe Oblivion has more beef and roundness, with sustain and dark tones, Crush has more impact and brighter tones with short sustain.
Finally, Oblivion comes with processed and unprocessed samples. Crush have a bit of processing done to it.
I hope it helped you !
Which kind of music do you intend to write ?