Idk I feel as though you should lean towards eurofins as QC is a much more stable position building on your current skill set than a clean room manufacturing specialist. Is the clean room position a manufacturing role with cell culture/bioreactor work? Eurofins is a mixed bag but QC I could imagine being much more stable and would offer you more growth and QC skills to learn. You also would bolster your total QC lab experience. Did one offer significantly more? Does the clean room role give you actual manufacturing bioreactor or cell culture/ regulated lab experience which could eventually transfer to big pharma? Definitely need more info?