Same kit - ?different results

[Gadget]

I've got results of a match from two sites both using the same original Ancestry kits

Ancestry -
24.3 cMs shared across 3 segments
Predicted - 4th cousin  (Range - 4-6)

GedMatch -
 Largest segment = 37.3 cM
Total of segments > 7 cM = 53.1 cM
3 matching segments
Estimated number of generations to MRCA = 4.0

Can anyone explain why they seem different, please. I'm still a novice.

Gadget

[mgeneas]

Interesting, I have never done that  - until now

With a distant match (and we cannot find the connection yet, it may be my great grandmother with the unknown father))
I share
28 cm on Ancestry over 2 segments
37 on My Heritage over I
32 on Gedmatch over 1 or more

[sugarfizzle]

It doesn't explain it this time, but don't forget different sites have different criteria for matches.

Ancestry go down to 6cM for a match, familytreeDNA include much smaller matches in the total, whilst most other sites have cut off points higher than that.

Further information at ISOGG -

https://isogg.org/wiki/Autosomal_DNA_match_thresholds

Regards Margaret

[Gadget]

Thanks Margaret but that doesn't explain the really wide differences in the cMs  across the same number of segments 

PS - Gedmatch got my eye colour too pale as well