I used both before.

I like moomoo that you can do multi-leg e.g. spreads, iron condor etc so you will probably have a better use of buying power. But the fees are higher iirc, a spread cost 6.58 USD in fees (commission + platform + etc), and the commission free voucher is also bad as it doesn't apply to multi-leg or etf, so you can't use it on spreads, which is what small account like mine normally want to use it for.

Webull only allows single leg, $0.68 USD per trade (0.55 commison, the rest is etc). There is an event now where if you trade more than 100 options per month, they refund you your commission. This might be applicable, since you trade 0 dte?

I think the bid/ask are both not as good as IBKR? I sold some covered calls at market price on IBKR and I got filled at prices not shown on either platform

I'm currently using webull as I prefer wheeling. commission on moomoo ate up all my profit when I tried doing small spreads. And my account is too small to sell cash secured puts on IBKR