Thank you for using Healthcare Magic. The difference in color of the tablets may be because the manufacturer of the generic is different. Both should be standardized and should be equally efficacious. Long term definitive management of gall stone related pain would be removal of the gallbladder (cholecystectomy). Please seek referral to a general surgeon. In the interim seek immediate medical attention for pain that is not relieved or worse than usual, fever and inability to tolerate oral foods entirely as this may be sign of cholecystitis which is when the gallbladder is infected and inflammed. This would require immediate medical evaluation and more urgent surgical intervention. Take care and be well