Are hard rice and soft rice soft or hard? There is another question, whether the "Jin" mentioned by the subject is pure weight. If it is rice, the weight of A Jin with hard rice and A Jin with soft rice must be the same, which is the same as that of A Jin with cotton and A Jin with iron.

If the topic is not about weight, but about heat, then the heat of a kilo of hard rice is different from that of a kilo of soft rice. Soft rice absorbs more water, so the water content is high. In this case, the calories are lower than those of hard rice.

I hope this helps.