"fadl" in the context of the verse cited is that they were given/granted certain things. In relation to revelation and the mission of prophets and messengers all had different things to deal with while some others had a bigger role in their circumstances. As Ihsan pointed out the following verse mentions that Moses (pbuh) was spoken to as his support to his mission. Jesus (pbuh) had his miracles and reinforced with the holy spirit for to fulfill his objective. Clearly, there is no issue of superiority. That seems to be from that insatiable human appetite to not only be right but to feel like they have/belong to what is best. We are clearly warned not to be like others who have taken their priests and prophets and exalted them beyond what is spiritually appropriate.
Al Ma'idah 44 says nothing about deputy-ship.