Being a nurse I have dealt with both and placed many nasogatric tubes, both the regular NG and the dubhoff. The PEG was by far the better choice for me. With the NG tube it is held in place with tape, you have a much greater chance of it slipping out of place and if it does it can slip to the point the end of the tube is in the lungs instead of the stomach meaning everything you put in that tube goes into the lungs, checking placement before each feeding can help eliminate this but the risk is still there and it is next to impossible to check placement of a dubhoff without a X-ray. With the PEG once it is in place it rarely moves unless it is pulled with some force and if that happens in most cases it is just going to pop all the way out. The NG tube is also more obstructive IMO, you will have a tube hanging out of your nose and being that I still wanted to go to work and get out and do things it wasn't for me. With the NG you also have a tube running down the back of your throat which I have been told can be somewhat annoying. After the initial soreness wore off from the PEG it was hardly noticed and it was easily hidden under a shirt and tucked into my bra.
IMO the NG tube is something for a short interval of time if nutrition or suction is needed fairly quick. The NG tube was not even offered to me, it wasn't a thought at all. I have never heard of it offered as a solution for nutrition other than a few short weeks.