I was thinking about this the other day. For me, these 19 episodes are the single strongest run the franchise has ever produced. It's a degree of consistency unheard of in the old 20+ episode shows, and it's doubly impressive a half-century on. To me, that's the bigger story about the two seasons.
IDK, TOS1 and the middle of TNG/DS9 had some pretty strong runs.
"Dagger of The Mind" to "City on the Edge of Forever" is around 20 episodes. I don't think there is a dud in there (OK, maybe Alternative Factor). And more classics (City, Space Seed, Balance of Terror, Arena, Menagerie, Devil In the Dark, This Side of Paradise, A Taste of Armaggedeon, Corbomite Manuever, etc
But I consider TOS1 to be THE best season of Trek. And I believe SNW 1-2 is right there with it. TNG 3-6, DS9 4-6, and PIC3.
Next Tier would be TOS2, DS9 3 & 7, VOY 4-6, ENT 3 & 4, DISCO 1 & 4, PIC 1, LD 2, PRO 1, and TNG 7.
Tier 3: TNG2, DS9 1&2, VOY 1, TOS3, LD 1 & 3, TAS 1.
Tier 4: TAS2, TNG1, VOY 2-3 & 7, ENT 1&2, PIC 2, DISCO 2&3.