Hi, First post here. Haven't been able to find a direct comparison between these two. Which of the two are considered to have a more natural as opposed to neutral sound between the ATH-A900X and XPT100? A900X seems to have slightly more 3d effect, maybe slightly better distinction between different instruments but I'm noticing some sibillance in cymbals and Ss as opposed to the XPT100. XPT100 also seems to leak way less with their angled pads if thicker padding is set up towards the back of the head. Having said that I have no idea which is considered better at producing a natural sound. Any help would be appreciated. Thank you.