I'm sure each casino set its payout percentage differently even when they are sisters. I played with Jackpot Capital group the most recently and I loved to play at Grande Vegas casino. Its slots just hit better compared to its sister casinos and this is the reason I have more cashouts at Grande Vegas.
In fact I had only a small cashout at Lucky Club two months ago and zero cashout at Jackpot Capital or Slotastic while I had 4 cashouts with Grande Vegas 1.5 months ago. My deposits at Slotastic had always gone like the winds everytime. Back to Grande Vegas, I made a $40 deposit with 100% bonus this early Sat morning and games won me some decent amount were Mayan Queen, Ronin, Triple Twisters and Wok & Roll.
There are many new RTG games and I kept playing these new games most recently, but forgot about playing the old games like Ronin, Derby Dollar. I like the respin feature on Ronin game and I had 4 scatters today with initial $100 win of $1 per spin. Triple Twisters also gave me some decent hits on 50 cents per spin (see screenshot), however, its free spins won too little when I changed my bet to $1 per spin.
My balance was about $330 when I began to play Wok & Roll to clear my wagering requirement, and Wok & Roll also hit well, I had 20 free spins of Chef feature and 24 free spins of wok & roll feature. I eventually cashed out $501 with Grande Vegas.