ARR engine is different, even if playing of a slower laptop drive, the caching, ect is utilized better. SO you won't see the stutter mess of 2.0

Unless you are made of money a sufficient SSD for gaming isn't going to be easy. It's actually better all around, to have a ssd act as the direct load cache to windows. It will speed all around performance up for common used applications. Havign sufficient main memory is also a main step.