Answer:
Hi!
An End Colostomy is when the colon is completely severed in half. A surgeon closes the end that leads to the rectum while creating a stoma with the other end. With an End Colostomy, a patient's fecal matter discharges only from the stoma.
A Loop Colostomy is when a surgeon takes the intestine/bowel, loops it through a small abdominal incision, and cutes the intestine half way. The surgeon then attaches the folded, double opening stoma to the abdomen. In this case, because the intestine is not completely severed, it is possible to continue rectal fecal passage.
I have had both. I prefer to have my EC, so as not to deal with fecal matter exiting two areas of my body. Hope this helps.