Your cardiologist is the best person to decide that. Both are equal but astents is not helpful in every case especially when the blockages are in left main vessel. A stent procedure is less invasive and heals faster and thus leads to a faster recovery but it cannot be always an option.
Whether to have a bypass surgery or not cannot still be decided on these facts. Factors like a person’s age, other medical conditions like diabetes, kidney disease, aortic calcification, previous medical history etc. make an important role in deciding. Various diagnoses including imaging tests, ECGs, ECHO and lab tests recommended by the doctors are mandatory.