You are probably best off staying put for several reasons. First, if you have AS, change is going to affect you more, as most of us don't like disruptions of routines, and this would qualify. If there is a clear positive outcome it would be worth the risk. If you are comfortable where you are, stay put, as it will take you months to get the same level at the other place. Also, a larger place has more hierarchy and fixed rules that may not wash with those with AS, and did I mention more people to interact with. Also note any increase in pay will get mostly eaten by taxes.