It is hard to determine the scale length from these pics but I won't be surprised if they are 25.5 just like the first version. Maybe 26.5? I own the ESP version and I had some intonation issues with the low B string (still a killer guitar! I ended up with the standard 7 string gauge) . I have tried thick strings too but I felt the tone was too muddy with heavier gauge. Chthonic's songs are all in standard 7 string tuning (so far) and I assume Jesse kept it 25.5.
It would be fantastic if Jesse himself or someone from this forum who knows Jesse in person can confirm this for us! Also very interested to know the guitar's specs too. I am assuming it is Alder body, maple top, maple neck ebony fretboard with Lundgren or Duncan.