No, I'm not talking about a ISOT, I'm asking what could have happened if the Sultanate of Rum had defeated the byzantines instead of the ottomans, and as the time passed they unified anatolia and greece and invaded europe earlier than the ottomans did OTL, what would have changed? Could they create their own janissary system? And about the roman title, Rum meant rome, could they really claim to the sucessors of Rome to the muslim world (since the christian world would never accept that)? Could this also sparks a early fourth crusade, but this time against the sultanate that holds constantinople (if they already captured the city by 1204), and if not (if the byzzie empire still is alive in 1204 in this scenario), the crusaders looting of the city allow the Sultanate of Rum to conquer it from the latim empire?