Hemani Oil is from Saudi Arabia and your oil is from Yemen. It is possible number one that they are using two different flowers or even processing. Some companies use black caraway which is a different flower and not good quality.
I personally like Hemani as it is available here but not saying it is the best by any means. I also tried an Egyptian one too but the Hemani is better. Oh well Jordan does not have the best of everything.
I wish you the best and either way Nigella Sativa is necessary for well being and we wish you the best in Yemen and your current struggles there.