There is a different between NTSC and NTSC-J in that the IRE is different. Some LD players actually had a switch for this since importing back and forth between the US and Japan was so common. It's extremely small and I don't even bother to calibrate my set for the difference.
However in the 16-bit era I know of no changes to hardware or software that were made to correct for this difference. There might be a different resistor someplace for it but probably not. Certainly I can't recall any games that compensate, like a US version of the game would have brighter colors or something. Certainly there is ZERO meaning to this term for the PCE/Turbo. No CD game has any idea what region it's being made for with regards to video signal or region. PC Engine games and Turbo Grafx CD games are %100 identical in that regard. Since no PAL CDs were made that makes the "NTSC" part meaningless because, on a technical level (as in "will this game play or not") the term "NTSC-J" does in fact describe Dracula X, but it also, on a technical level, describes every single other CD game for PCE. You might as well describe it as being round and shiny.
HuCARDs know the difference between "U" and "J" but there are no PAL HuCARDs* so that part is still meaningless.
So that's why around here we usually refer to things as being US/JP or being PCE/Turbo. Those are the only flavors and even then it only matters with HuCARDs.
As as a designation "NTSC-J" is something I never saw or heard as an acronym until the PS came out in Japan, fall of 1994. Before that the difference between U and J was usually ignored.
* I'm pretty sure the PAL HuCARDs that existed from the weird PAL Turbo period in Europe aren't actually PAL, just the system is. Someone else can verify that.
[EDIT] for clairty
Topic: Will NTSC-J Games Play on my US Turbo Duo? (Read 714 times)
