Do rogue talents "Scry Slip" & "Hidden Mind" stack?

[Wyrmfoe]

"Scry Slip" requires those targeting the rogue with scrying effects that permit a Will save to first succeed on caster level check vs. 15+rogue's level. "Scry Slip" wards both the rogue and any objects the rogue is wearing or carrying.

"Hidden Mind" wards the rogue with a constant "Nondetection" effect, which enacts the same requirement of a successful caster level check vs. 15+rogue's level, but impacts more categories of divination than just scrying effects.

My question is whether these two talents stack?

A follow-up: if not, is there a reason to get them both?

Is there something "Scry Slip" provides, that "Hidden Mind"'s "Nondetection" effect doesn't cover?

[James Risner]

Ask your GM.

They could subsume the two checks into one check or leave separate.

[Cellion]

They stack in that they are two separate layers of defense. A Scrying spell would have to work through both checks. GM might houserule otherwise though, so be sure to ask.

Hidden Mind is by far the better one (being Ex and covering a broad range of effects rather than just Scrying) but it is also an Advanced Talent. So I guess Scry Slip provides the value of not taking up a valuable Advanced Talent slot.

[Diego Rossi]

When you cast a spell normally you do a single caster level check against all targets SR. I would say that if a target has different spell resistances, you still make a single caster level check to bypass them and apply it against all the resistances.