Topps Paul Skenes RCs ⭐ The Top 4
If you take the spectrum of 2024 Topps-branded Paul Skenes rookie cards and rank them primarily on collector popularity + visual appeal + long-term hobby significance, while excluding autographs, relic/patch cards, all 1/1s, and all serial-numbered parallels, I would rank the top 4 as follows.
I think there is a very meaningful separation between the first four and the rest.

#1 — Chrome Update Image Variation SP
This is the card I would put at the top if the question is "Which non-numbered Skenes RC is the ultimate collector card?" It combines the RC logo, Chrome, Skenes, alternate photography and genuine scarcity. The Chrome Update image variations are legitimately difficult pulls—roughly 1:183 hobby packs, 1:72 jumbo and 1:187 mega.

#2 — Topps Update Golden Mirror SSP
This may ultimately challenge #1. It has the advantage of being attached directly to the #US100 flagship rookie, and the Golden Mirror variation is a recognized Topps SSP concept. Current market evidence also demonstrates substantial collector demand.

#3 — Chrome Update USC88 base
This is the card I would describe as the "premium true rookie." Chrome Update sold out extremely rapidly and became one of the most sought-after products of the 2024 rookie class.

#4 — Topps Update US100 base
This is the historical foundation of the collection. If Skenes eventually becomes a Hall of Famer, this is the card that casual collectors, non-card collectors and future generations will immediately recognize.

And that distinction matters.

I wouldn't necessarily say #3 is more important historically than #4. I would say Chrome Update is more desirable to the modern hobby, while Topps Update #US100 is the foundational Skenes rookie card.