The real difference is that there’s lots of properly-trained scientists out there, conducting ethical research according to scientific principles, about how brains function. They document their methods and results, trying to eliminate bias and chance, and publish their findings for scrutiny by other people in the field who are also trained, ethical, and methodical.
Chopra’s abilities are vouched for by half-baked ‘researchers’ with dubious credentials and/or sloppy methods, who aren’t fussed about a bit of bias or chance creeping in, and their work is usually done in conjunction with some New-Age institute of woo-woo, who aren’t looking for any results that don’t confirm their preconceptions. The methods and results are rarely published, and almost never in journals that have reputations for any sort of rigor.
If science can’t yet explain all there is about brains, it’s not for lack of ongoing and rigorous effort.
If anyone has an explanation for Chopra’s claims, it’s almost certainly due to lack of rigorous effort.