My primary point is that it's not a slam dunk for either side. Nothing's obvious about the "impact" here. I you're interested in picking a product based on its environmental impact, there are going to be many factors to consider. Just peruse this 200 page report from the UK government on the subject:
This study has serious methodological issues. I would encourage you to carefully peruse it yourself before citing. This is far from the only issue, but the fact that someone who works at Procter and Gamble is on the study's advisory board is... fun.
https://assets.publishing.service.gov.uk/media/5a7c4096ed915...