Well, those are not screenshots, for starters.
Most likely touched up...although, they're also only 720p...maybe they're getting Ryse level of quality...(doubt it...but who knows). It IS however a direct shot from the game...because I took a shot at almost the same time.
Here's 720p on the PC (TOP) vs the new "screenshot" (BOTTOM).
They definitely re-did the lighting...and the skin/blood textures. That rebar looks like crap no matter the hardware...lol....sort of ruins the picture. Tons more blood on the PC build.
The hair on the PC (THIS IS MY OWN PERSONAL SCREENSHOT I TOOK) is MUCH better looking still.
As for everything else...well they just sort of changed it. The bow difference may just be due to "upgrades"..also my Lara shot was taken a bit earlier in the scene...so she's in the middle of squinting/blinking...lol.
The hair though...again...looks far better on the PC version. I do prefer the skin tone on the rebuild, but less blood doesn't make sense due to what you just climbed out of.
Edit**
Here's what you just climbed out of (and were swimming in up to your nose)...that's why the screenshot on PC makes sense and the new build doesn't...honestly.
Both of these are scaled to 720p direct captures from my PC too.