You’d be fine with either Moderna or Pfizer. Neither vaccine was developed or tested using fetal stem cells.
A third party company did confirmatory testing using fetal stem cells after each of those products was fully developed, packaged, and ready to ship. To say they’re now tainted by that would be like saying that if someone bought Tylenol off the shelf at Walgreens and did testing with it using fetal stem cells, all Tylenol is now tainted.
Fruit of the poison tree. My comments stand.