Not very scientific, but I know 1 former Steiner pupil and one former home ed pupil.
The Steiner guy might be thought of by some as eccentric. I think he’s amazing- positive, takes risks and resilient enough to cope when things don’t go quite to plan. He is only in his 20s but he has already lived a fascinating life, and I envy the confidence and focus on happiness (rather than focusing on wealth, status etc) he has at such a young age. He credits his school for his approach and outlook on life. My children don’t go to the local Steiner school (literally just a few miles away) but that’s because their school is a better match for them and me, I think.
Home ed pupil is probably not a fair representation of home ed pupils generally. His mother is very religious and, tbh, I find her very prejudiced and narrow minded. For example, she is a creationist and vehemently anti-vax. Her Facebook posts make no sense and all come from this cult like church in the US. It’s actually quite frightening, to see some things she comes out with.
Predictably, her home ed DS has the very same views. He is incapable of critical analysis. If it fits with his view then it must be right, regardless of the source or background to the article. He will make just bizarre and sometimes extreme claims (people being cured of permanent blindness through miracles in far flung countries, everything bad in the world is down to Islam and Palestine, world is heading for the second coming and I am off to hell at that point...etc) based on what a blogger says. He thinks David Ike has some valid points. He then cannot back up or defend these claims, and usually just goes off in a huff. He also has very few friends.
I am not saying that home schooling is bad. I am just saying that there’s a risk in doing so which has to be acknowledged and worked through. A rounded education surrounded by different people with different views can help create a more rounded adult. Conversely, home schooling risks narrowing the person.