New Member Engine question

Hi Guys thanks for the Add ..First off im new to the group and a Titan owner ...my question is i have a 2007 Titan LE with a blown engine ( stalled while driving , restarted and died ..with oil and coolant leak ) i was told by a Mechanic that the replacement engine should be from the same year truck ? because the electrical connectors are not the same year to year . and would need the wiring harness to be modified with the donor ECU ( if its a different year donor titan ) is this true ? any Suggestions or knowledge would be greatly appreciated

Thanks
Vince