If I'm understanding your argument correctly, the fact that eastern and western subjects have affects in their NDE based on culture & faith. . . I believe I echoed the same but then pointed out that certain common elements exist in each. The problem is, the skeptical mind choses to redefine or categorize such things so as to fit their view as to how things are and aren't . . . or so such things prove to be quite typical.
When it comes to Reincarnation, the most progressive research on the subject is actually being done in the U.S. on American/Western European type individuals (though a handful from eastern cultures have been welcomes for one or another reason) I'm unable to find the article at the moment, but the UTNE Reader did a fantastic article on this particular group and the topic a few years ago as has the news show 60-Minutes on CBS. What is being discovered is the fact that children under 8 years of age and who show a sevante-like nature (particularly when it comes to math, music and physics) tend to have both, the belief that they lived in a previous time, but the ability to given some hard to argue specifics that support said claim. These children tend to be exceptionally intelligent, have had no familial or environmental exposure to the idea of reincarnation let alone the regions & histories claimed as memories.
I personally encountered a handful of related events that support this issue as well, starting with a boy that would throw horrible tantrums from the time he was able to speak, when it came to people calling him by his given name. He would insist that his name was something other (I'll not say it) and this continued well into his 4th grade year in school when he explained to a teacher who'd ticked him off, that "There was a day I'd have your head for treating me like this. . ." The teacher in question sore that the boys' featured visibly changed along with his voice and demeanor. . . I can't say if that's so, but the poor lady was never the same after said event.
No, the boy has no psychiatric/psychological issues; today he is gainfully self-employed as a computer tech living in south-western Ohio.
I'll not go into any other details when it comes to the "environment" surrounding this boy and his family, only to say that several other incarnates were involved who, in this life-time, were complete strangers and yet, upon meeting knew exactly who the other person was even before anything was mentioned. One set of individuals being a woman who had aborted her child in a previous life-time and the person she met in this time was that child. . . long story but rather interesting to say the least.
More than any other spiritual "theory" some form of reincarnation can be found the world over; it is a constant of sorts. The only reason it is not part of the Western culture traditions is that it was removed from the christian teachings in the mid-5th century c.e. by the council @ Constantinople, otherwise it can be found there as well as in older Hebrew teachings.
As I said previously, there's really no way to give to the disbelieving the sort of tangible proof they demand when it comes to this and several other issues. Science may one day develop the resources that can reveal this constant, but we're simply not there
yet.