The main distinction is the dual camera on the Plus, which let's you do the portrait modes they demonstrated. The other difference is battery life. As someone that went from 7 to 7 Plus, it is a considerable improvement. Portrait mode really is amazing, too, it would be hard to go back to a normal sized iPhone now.

The main advantage of the X, that I see, other than OLED screen, is that you get a display closer to the Plus in a much more reasonable form factor. For some, the Plus is still too large.

I meant that it is said as if the iPhone X is the best phone, if you are willing to pay for it. But some people are only willing to deal with non-Plus sized phone, at most.

They're roughly the same size although the X does have a much larger screen. However they're removing the reachability feature which means that a good chunk of that larger screen will be difficult to use one handed, which won't be true of the 8.

The iPhone 8 does not have dual cameras, which for some people is the key reason for going with a Plus-sized model. I hate how big my 7 Plus is, but I bought it for the cameras. I look forward to having a smaller dual-camera phone — either the X or a subsequent model.

The iPhone 8 Plus is roughly the same size as the X, not the iPhone 8.