HoLep vs TURP

My husband is scheduled for prostate surgery early Nov. The doctor has agreed to do his cystoscopy under full anesthesia right before surgery… this is because the first time my husband had a cystoscopy he was fully awake, and it was very painful for him. However, the doctor stated that he would have to decide at that time whether he would perform the TURP or HoLep. Can someone advise the differences between the two and benefits/cons also between the two? What determines which procedure the doctor will go with?