I have not read a lot of Jeph Loeb. I loved his 'All Seasons' and 'Spider-Man: Blue'. I liked his 'Dark Victory' (It was not as good as 'Long Halloween'). I loved this particular picture. The muscles would interest me and the words 'For Truth For Justice, Forever'. It will take a looong time for me to reach his run.
I looked up the covers you mentioned. Well they are weird. What i meant was muted colors looks good, as Superman is the one who comes to one's attention. Have never seen anything like them. I admit that they are different. Superman placed on photographs. It would intrigue anyone who watches them.
My favorite of these three is Action Comics #419. All three are interesting with 419 looking something special. Not exactly my choice as art. But they are good and unique. I like them. It looks kind of gimmicky which would precisely attract me as a kid.