Thanks very much for the chart and the extensive work that went into it. The low point on the chart is the cell-pair for 23andMe v2 and 23andMe v5. So is 23andMe going to upgrade all of their prior testers' results to v5? Otherwise, they are diluting the value of an earlier test at 23andMe and thus diluting the value of the size of their database and the value of their tools. The only way to make an apples to apples comparison on 23andMe is to make sure every test is an apple. Are they going to do that? ---------------------------------------------------------------------- Date: Thu, 24 Aug 2017 17:35:00 -0700 From: "Tim Janzen" <[email protected]> Subject: Re: [DNA] schism Dear All, I thought I would let you know that over the past week or so I have been running comparisons between the 23andMe v5 data and the data from the other companies to see how many autosomal SNPs overlap between the datasets.  See the top chart at https://isogg.org/wiki/Autosomal_SNP_comparison_chart#Autosomal_SNPs. I have several more Genes for Good comparisons to run and then this chart will be complete.  My initial impression is that 23andMe is doing a reasonably good job with imputation for the matching segment data for DNA Relatives. My impression is that the imputation for the Genesis Project at GEDmatch is not quite as good so far.  It is unfortunate that this "schism" exists for 23andMe v5 and Living DNA data, but that is the way that it is.  I wonder if and/or when Family Tree DNA will be converting over to the Illumina Global SNP Array chip.  My suggestion at this point is that it would be prudent to test all of your closest family members on a GSA chip (23andMe v5 or Living DNA) so that you can upload the data to GEDmatch and be assured you will being seeing all of your matches who have tested only on a GSA chip who share reasonably long (say 15cMs to 30 cMs) DNA segments with your family or you.  Mike, in my opinion all serious autosomal genetic genealogists test at 23andMe.  23andMe has well over 2 million people in their database so it is would be unwise for a serious autosomal genetic genealogist to not test there.  23andMe certainly has the best DNA comparison tools relative to Ancestry.com, MyHeritage and FTDNA's Family Finder.  GEDmatch offers unsurpassed genetic comparison features that we need as well. Sincerely, Tim Janzen  -----Original Message----- From: GENEALOGY-DNA [mailto:[email protected]] On Behalf Of Michael Fisher Sent: Tuesday, August 22, 2017 7:33 AM To: [email protected] Subject: Re: [DNA] schism Hi I was thinking of testing at 23andMe already having AncestryDNA and FTDNA but will give it a miss now. How does LivingDNA compare ? How do these new tests perform in the terms of matches to each other with the same provider or to a similar new type test provider ? Mike Fisher