If I had to pick one, I'd pick the NTT. Even in your pics, you can tell that IT are a lot more likely to be unstable. If you look at the threads here about stable/unstable dats, most of the unstable ones that people are trying to fix are indonesian tigers. I've had both NTT and IT and NTT has always been more stable IME. Plus, IT are so common now. In my area, there's always people unloading they're unstable ITs.