This is version 2 of Starship, with some upgrades, such as longer starship.

"Upgrades include a redesigned upper-stage propulsion system that can carry 25 per cent more propellant, along with slimmer, repositioned forward flaps to reduce exposure to heat during re-entry.

For the first time, Starship will deploy 10 Starlink simulators" [1].

https://arstechnica.com/space/2025/01/heres-what-nasa-would-...

[1] https://www.theaustralian.com.au/world/musks-starship-ready-...

I found an article from earlier in the week about the changes for this version of the upper stage: https://arstechnica.com/space/2025/01/a-taller-heavier-smart...