Hi Shiori,
I think at this point it’s a matter of your choice. If shelf life is more important to you, then go with refined shea, but if whole plant (less intervention and less likeliness of chemicals in the process) go with unrefined. I personally prefer unrefined, which can still have a shelf life of a year at least if stored well (away from fluctuating heat and moisture).
With warmth,
Benna