Excellent question. First of all, hair graft QUALITY with the donor strip and/or FUExcision techniques is one of the keys for a successful hair transplant. In my personal opinion and experience, the hair graft quality is much better with the donor strip vs FUExcision technique. the poor or decreased growth of your 1st surgery could be related to poor hair graft quality and high hair transection rate + recipient site issues (making the recipient sites and placing the grafts), etc. Donor harvesting with FUExcision technique in African decent hair requires a great surgeon's experience. So, it depends of your donor availability, both techniques could be good option in your case. I will suggest you to book a consultation with a trained and experienced hair restoration surgeon in donor strip and FUExcision techniques. Good luck.