Ninja spy and assassin SA stacking?

[Guartwog]

I'm planning out my next build and was curious - do the +SA die from ninja spy stack with those from rogue?

For instance, would a level 1/1 rogue/monk be able to get +2d6 and +2hit on SA just from taking both enhancements, or would you only get 1d6 and +1?

[Visty]

in the feat section under sneakattack both of them increase the number of dice

[unbongwah]

AFAIK, all forms of sneak atk will stack except the sneak atk from half-elf rogue dilettante won't stack w/base SA from rog lvls but will stack w/Sneak Atk Training.

[Munkenmo]

They definitely both stack.

my Roguenmo build utilizes both.