and even the pic of this one isn't the same as my 78 Sabre
The 78 had the string tree over the D & G strings, the bullet truss rod on the headstock, uncovered 8 pole pickups, mode switches, and the ashtray bridge.
Those are the aesthetic differences you're seeing, and when Ernie Ball revised the instrument in the 80's, they moved the string tree, changed the bridge for the regular Stingray mute Bridge, and eventually replaced the mode switches with the blade selector (and in the process changed some of the modes to something actually useful).
The "Classic" is a reissue of that Ernie Ball era Sabre, but with the advantage of the 16 pole neck pickup (hence the covers), and the truss rod wheel.
From an aesthetic point of view, I don't get the HH Stingray. It looks wrong to me.
I get that most people that want a Stingray, haven't heard of, or experienced the Sabre (which is in part why it has always struggled). So an HH Stingray seems like a case of "can't beat 'em, join 'em."
Of course the Sabre doesn't quite get the Stingray sound, so there is that aspect.
It is strange though, that with the Stingray & the Sabre, and the Cutlass & Caprice, EBMM offer their own spin on a Precision & Jazz, but avoid marketing them as such.
Fender manages to celebrate the distinction between the two instruments, with both having their own unique sonic identity.
But for some weird reason, it seems prospective MM buyers expect one to do the job of both, and the other eventually slips into retirement.