Whilst I will agree with Mike on the theory behind his list from having looked at so many certificates over the years there are pitfalls with all certificates

I remember helping at the FindMyPast stand at the last WDYTYA Live event and being asked by someone why her husbands entry in the 1939 register was not unlocked.
He had died in 1985 so there was no real reason that I could see other than the data from the certificate did not match the register
Then she suddenly said “Would it matter if I got his date of birth wrong on the death certifacte”!!
So I sent her to go and talk to the GRO about how to change it

I also remember when I went with my mum to register dad’s death in 2001 being asked about his place of birth
So I gave the address – was not what they wanted. They wanted the registration district
The one that it actually was did not appear on her list so had to talk the modern equivalent which could lead someone who didn’t know any better to the wrong person

Death certificate in fact often have more errors than most as the person who really knows the answers is the one who can’t answer them – the deceased

Regards
John Hanson - researching the Halstead/Holstead/Alstead names
Researcher, the Halsted Trust - https://www.halsted.org.uk
Research website - https://www.halstedresearch.org.uk

Whether a Marriage or Death certificate gives better information depends on a number of factors.

The following refers to the UK.

Many early Marriage Certificates simply say of Full Age which only tells you they are older than 21.

Whereas a Death Certificate or Burial record gives a specific Age at death.

Later Marriage Certificates do give the spouse’s Ages but no Place of Birth.

Whereas a Death Certificate gives an actual Date and Place of Birth.

So in my opinion a Death Certificate is usually better than a Marriage Certificate.

Also a Census record for a child usually gives an accurate Age and Place of Birth.

Regards, Mike Tate