Basically. As far as I know, the only difference between the two is that the 6P records slow motion video up to 240fps and the 5X records up to 120fps.
Yeah, there are a few differences related to the ability of the SD 810 to handle higher data rates than the 808. But for still shots, it is reasonable to assume that the 5X will perform the same (or close enough to not make a difference). So if the DXOMark testing holds true and others coroberate, that's will take great pictures.
I'm actually really intrigued by the choice they made on the sensor. They pretty much broke away from the rest of the OEMs and choose to pick a still/video sensor rather than a mobile one. Pair a large sensor (physically as big as the 21MP unit in the MXPE) but with those big pixels. It might sacrifice the fine level detail, but get back light sensitivity and reduced noise in the process (what good are more pixels if they are noisy). HTC was on to something back in the day. The Ultrapixel sensor's bits were even larger; 2 microns. They just stupidly choose to handcuff it by going WAY too low on the resolution (among other issues). I mean, my wife's Olympus compact (apples/oranges, I know) is 'only' 12MP, but takes nice, highly detailed pics. Once you start getting past 8MP, you really have to start zooming in before you start to see junk... so it's a matter of 'better' not 'more' now.
Another thing that I was thinking about... I wonder if the omission of OIS was out of technical reasons... The cameras that have OIS rigs were all designed, from the ground up, to be stuffed into phones. That means extremely tight packaging constraints in every dimension. So any OIS system needs to be extremely compact and efficient. On still and video cameras, there's a lot more room to work with. Perhaps adding OIS to the 6P, nevermind the 5X, would have required a sensor housing that was a too cumbersome to be feasible. So they left it out and relied on the fact that the reduced exposure times needed with counteract.... Of course, like DXO noted, this doesn't help when taking video (though, that isn't to say they scored the 6P video ability badly. Guess we'll have to see what things are like when they get into people's hands.
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