What are the benefits to use those Pool instead of roi.optiminer.pl ?
Many small confirmed payouts vs few huge but unconfirmed payouts
The things are opposite but OK

, the small unconfirmed payouts are in Optiminer , and what prevent the Pool owner not to pay miners. Because in Optiminer , miner get the payout on each mined block.
The exact question should be, does suprnova is more profitable than optiminer?
For now it's not for sure. But it might be if more miners come and spread the hashpower between those two pools. For me it's much reliable because it accepts more shares and doesn't request work restart so often. I've been mining quite a lot of coins there and never had problems.
On this stage this mean optiminer is still more profitable, because of hashrate.
This sentence makes no sense, your hashrate on both pools is the same and as long as the pool IS actually finding blocks, you'll get the same amount of coins.
The hashrate is same , but miners get payment when the pool find block. The most of blocks are found by Optiminer Pool, for me this mean mining there is more profitable on this stage.
The number of blocks a pool finds is not relavent to the overall yield on a particular pool. Larger pools give more frequent deposits to your account but smaller deposit amounts and smaller pools give fewer deposits but larger amounts. Given the random nature of coin mining either kind of pool should give equivalent payouts if they are both using the same payout method(PPS, etc.). The main differences between pools that should be considered are:
Pool has a good reputation of honesty, availability, and performance
Pool has low mining fees
Pool has low cashout fees and flexible options to set automatic cashout level
Pool is easy to setup and access by your miner