In general, Onkyo and Integra internals are the same.
One difference between the two specific models you mentioned is that the 40.1 is ISF certified. IMO, from what I have seen, displays seem to continually be improving in calibration flexibility as it is, so your need for those adjustments will be somewhere between slim and none is my guess. I don't know, YMMV there.
It looks like the ISF includes ISFccc, which means you should be able to calibrate independently for day vs night for the sources connected. What I don't know is how involved/flexible these adjustments are. My guess is that they are basic, but then OTOH even basic controls could be useful if you do split your viewing between high and low ambient light conditions.