Opinions on autograph authentication

Does it make any difference whether an autograph has been authenticated by PSA/DNA or James Spence.....Does one have a better reputation than the other? Do people prefer one to the other? Does one generally have a higher resale value than the other?
Eyebone
Eyebone
"I'm not saying I'm the best manager in the world, but I'm in the top one." Brian Clough
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Eyebone