Best buy Kindle paperwhite-Expert recommendations to choose.

I researched the best e-reader as I've been trying to cut down on screen time from my phone. i have been experiencing eye strain and headaches after long reading sessions. i went through reviews from trusted sources like Best Buy and The Verge and after comparing many options these two kept coming up as the top choices:
Kindle Paperwhite Signature Edition

Amazon Kindle Paperwhite 16GB

however, i am having trouble deciding which one would be better for me and i would love to get your expert advice and hoping maybe some avid readers or tech enthusiasts on this forum can also share their advice.
i usually read in low light before bed. Which one is recommended for me? Any suggestions or advice would be appreciated.
Thanks in advance