i was talking about valid shares, not interest in cheating.
what i saw is that xpmclient 10.2 with target=10 generates more shares than same client with target=11 for the same difficulty.
i didn't direct compare it with xpmclient9.4.1 but it seems that is better to force old xpmclient until EOL.
You will get less profit:
* difficulty < 10.994 and target="11": miner will generate less amount if shares.
* difficulty > 10.994 and target="10": big amount of shares will be marked as invalid.
When pool switches to "11ch" mode, it begin reject shares from xpmclient with target="10", because it's cheating same as target="9","8" etc. Now pool again in 10ch mode until 10.994 difficulty, best option now is using target="10" and wait xpmclient 10.2.1 release.
I try release xpmclient 10.2 and switch pool to "11ch" at 10.991 difficulty, but less than 10% miners install xpmclient 10.2 or put target="11" to config.txt, all others continue using old settings. I decide that miners don't ready and make rollback.