That's not a valid comparison either. Luck can easily cause a large variance, even between different blocks
in the same pool.
You just need to follow a block until it is credited to your balance, verify the credited share percentage matches
your hash rate, the amount of coin matches the percentage of a block, the BTC value matches the exchange rate, etc,
then magically see your balance is credited 20% less than the last value prior to exchange.
If you get paid in the mined coin it's even clearer as it eliminates any exchange fluctuation.
Those defending zpool should just do their own test. I've done my own tests (not recently) and analyzed the data
from two other users who posted detailed information of their tests. Simply comparing with other pools,
and especially Nicehash which doesn't mine coins directly, means nothing.
this is a valid point, i assumed a negligible variance as i assumed the user has a) large hashrate and/or b) uses an algo and coin which finds blocks on both pools every x minutes and thus reduces variance over a larger timeframe significantly
your approach is by far easier though and doesnt require another pool