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KMC X10 93 done 1000 miles , I usually change em then . But according to chain checker only 50 % worn and looking good with steel rule as well . So keep going or err on side of caution in case knacker cassette . KMC supposed to be more durable any way .
You've checked it by two methods both of which say it's still okay. Keep it going but keep an eye on it.
Steel rule is the better method.
Take it off and turn it over then refit, good for at least another 1000miles 😆
Unless your riding dry road miles then miles is a poor measure, I could clock up the same wear in 1 wet peaks ride as some people would get in 500 miles elsewhere. Use the wear measurements.