I think calling the turn and betting the river is ok, but not as good as the small raise. Which kind of hands he may have? A pocket or a flushdraw or air.
I don't see him firing another barrel with air too often, so we won't get too much value. With a pocket, he wants to see a SD and he won't bet the river too often. However, we may get a call to the small raise and can make a small river v-bet. Furthermore, we will often get a call from a FD.