escort mk7 1.6 zetec motors differences ???

Hello community ! I once have a question . Have sold the days my old escort mk7 1.6 16v 66kw automatic , and now have a new MK7 also with 1.6 16v 66kw Ghia as switch . Both BJs are also 96 and also tournament , and also euro 2 standards . Both motors are optically the same , only the new has another injection system , this silver EFI things . My old essi did not have this , since the air hose went virtually directly into the carburetor . Can explain to me ll. one why and waru m there are differences ? many thanks to mfg Andel