That is the difference and why I testify the way I do: God the Father revealed Himself in four ways: 1) in the Person of Jesus Christ His only begotten Son, 2) in the Person of the indwelling Holy Spirit, 3) in Scripture and 4) in Creation both physical and spiritual.
Correct. But that is hardly Trinitarian. Christian dogma of the Trinity posits that the Father, Son and the Holy Spirit are co-equal and co-eternal. The Bible speaks of the Son and the Spirit as errand boys of the Father; that's hardly co-equality. It's called suboridnaitonalist theology that is incompatible with the Trinitarian theology. It was actually taught by practically all early Christian apologistsuntil the first Nicene Council (325 AD).
The Father reveals himself in the Old Testament in his own person. He does not reveal himself in the person of Jesus Christthe Word (Logos) does! And the Spirit does not reveal himself at all. He is an errand boy who does things for the Father and the Son in the Bible; pretty much a third fiddle.