Is the price/quote of the FUTU pre-IPO market different from what you see at other brokerages

The pre-IPO market trading is not through the exchange system, but through the internal system provided by some brokerages to fix up quotes. FUTU's self-developed pre-IPO market is an independent internal trading system, and it is very normal to have price differences with other platforms.

Note: Some brokerages may have access the same upstream, so you will see the same quotes