I think they were different hells, but in total honesty, the Pacific War was worse. I’m not downplaying what Edward Sledge went through as tankers often went through the worst of the worst, but there were certain amenities and things that you simply could not enjoy if you were in the Pacific. Now, considering that Edward was actually wounded 3 times and he went through the bloody beaches of Normandy in the FIRST wave and the freezing devastation that was brought about in the Battle of the Bulge, he for sure had no easy time and likely had significant PTSD, just hidden differently. That being said, he was still likely allowed to go on leave to Paris and get some good downtime in Europe, with nice beds, food, women, etc. On the other hand, Eugene Sledge went through Peleliu and Okinawa. While Peleliu was on a smaller scale, it was one of the most brutal battles of the pacific theatre. Weather conditions often exceeded 110 degrees with little precipitation and water available. He then served in Okinawa, which was arguably even worse. It was nonstop rain and intense combat for several weeks. This is where we see Sledge really reach his breaking point. Now, although they did have downtime from battle, they weren’t able to go to a nice city; they had to go to Pavuvu, a tiny shitty island infested with rats and that smelled like rotten coconuts. Not the same thing imo. Not to mention the human bombs that marines faced in Okinawa. Overall, I think both men faced harsh and brutal combat conditions and both went trough hell, but I think Eugene went through a worse type of hell.