What happens when we replace a basic mock with its real implementation

TheBlob

var theBlobMock = new Mock<ITheBlob>();

VS 

var theBlob = new TheBlob(
                new SCP(new S(), new AP(new SP(new S(), new AL(new S()))), new SCS()),
                new S(),
                new CP(new S()),
                new MP(new S()),
                new AP(new SP(new S(), new AL(new S()))),
                new EIP(),
                new MF(
                    new GDP(),
                    new CP(new S()),
                    new S(),
                    new AP(new SP(new S(), new AL(new S()))),
                    new CP(
                        new S(),
                        new AP(
                            new SP(new S(), new AL(new S())))),
                    new IMP(new AL(new S())),
                    new T()),
                new DEP(new RW(), new S()));