Sanctified Slayer (Inquisitor) + VMC: Rogue. Sneak Attack Stacking

[Conall O'Kanis]

Hey all; I've seen this sort of question come up in the past with different examples, and after searching those sources I still haven't drawn a conclusion that I can confidently apply to the title's combination.

Do Sneak attack die from different sources stack as bonus dice, or do they overlap?

With the above example, a Sancified Slayer with Rogue VMC could have either 6d6 Sneak Attack, or 10d6 Sneak Attack.

If anyone could provide me a link, or quote to a section within the rules, or a Design team response, I'd greatly appreciate it. Me and my group don't accept speculation and opinion as sufficient evidence, so we really are stuck asking for a rules call on this one.

Thanks in advance to anyone who puts something down

[Rub-Eta]

RAW, they do not stack as they don't mention it (unlike assassin's sneak attack that does).
However, that only means they don't add up, not that they overlap. So you have 6d6 from Sanctified Slayer and another 4d6 from Rogue VMC (or what ever the numbers are). The difference would then be for qualifying for PrCs and such via number of sneak attack damage dice.