It should be noted
Top-Swing is the Shimano trademark for the design.
The one in the picture is a M901 for sure.
It’s not a M953
Plenty of M901 top pull 34.9 available
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The one in the original picture on the bike will be
M738 the XT* M566 the LX traditional style mech for that year. But that is not what is asked for, the XTR mech version is wanted when you read further.
So, the correct 'year' one would be the M901 but is a legacy mech and not updated and would look wrong, not until the 1999 M953 model did they bring the option. (the one in the second picture)
Really, they pushed Top-Swing style up until then by not giving a true M950 alternative, this seems to have worked though as it was the modern tech and well XTR used it, so for marketing you'd copy that in the lower range when specifying a bike.
That's my take on their marketing move.
Still surprised the parallel plates didn't trickle down to XT at some point but with steel plates.
I'd be looking for M953 (Traditional) or M952 (Top-Swing) for the XTR mech to go for.
EDIT * I read the spec sheet.