Fidelity vs Robinhood – Any difference in mid-price option fills?

I sell options on Fidelity and thinking about switching over to Robinhood to take advantage of their 3% transfer bonus + cheaper margin rate. I did some research and heard that the fill on Robinhood can sometimes be really bad. I’m curious if anyone here has actually noticed a consistent difference in getting filled at the mid price between the two brokers. If the quotes are identical, have you found that one broker (specifically Fidelity) tends to fill mid orders more often than the other (RH)? Or has your experience been about the same? And I'm talking about large-cap stocks and stocks with active option chains.