Not really. If you made a circle diagram, Panthers and veileds would overlap being able to handle either conditions, while montanes would only be able to handle heavy watering and cooler temperatures. To me that means one is more sensitive to changes. Even in this case, the Panthers are doing fine, and I'd be willing to bet they could handle more water just fine as well or on the other hand they could probably survive a pretty long time without water if they had to. I think we may just have two different ideas of the word "sensitive" lol.
And also I didn't say that made them more difficult. I really have no idea what's going on. Just throwing some thoughts out there to try and help a buddy out.
I really don't want to engage in this kind of argument but you can't compare what is an optimum environment that is different as being more "senstitive."
But, using your parameters, a panther and a veiled need additional heat. They will not do well at normal house temperatures. In fact, when they are kept too cold, like all reptiles kept too cold their kidneys will shut down. On the other hand, a quad or gracilior will thrive in normal house temperatures even though their natural habitat is about 10F cooler than a normal house temperature. They will breed a temperatures of
UNDER 50F to over 80F. I'd like to see a panther or a veiled do that.
So, I argue that in most houses a quad or a gracilior is a much easier animal to keep since you don't have to go crazy worrying about their basking temperature being too low or burning them because it is too high since you don't have to have a basking light.
What quads and graciliors need is water. That being said, most veileds and panthers I see on the list are kept too dry and are dehydrated.
Veileds and panthers don't seem to live very long in captivity. There are exceptions, but one breeder I know has a life expectancy of about 3 years. I have many of my wild caught imports that were imported as adults more than three years ago. The beautiful Pumpkin that I just posted a recent picture of in the photo section was imported over three years ago.
I've found that in general if a baby hatches, a baby grows up. There have been exceptions when I've had incubator malfunctions, but once hatched, even tiny babies will thrive and do well. I expect every egg to hatch and with the odd exception, they do.
They have proven to be a very hardy species.