Upper Hungary would be Lutheran, it was the main religion there, Transylvania would be the mix it was in OTL, Ottoman Hungary would be dominated by Calvinists, but we would see the Unitarians rise as in OTL and there would also be a Lutheran minority, we would also see a growing Muslim minority, but that one will “disappear” the moment a Christian army move through Hungary.
In general we can expect Ottoman Hungary to be as depopulated as in OTL as the Ottoman mismanament won’t change, which means that the Habsburg will still blitzkrieg themselves through at some point. But with the western part of Hungary also being put mismanaged by the Ottomans, we will likely see increased German settlement creating a far larger “Burgenland”. The biggest change will be how the Habsburgs deal with Upper Hungary, I expect they will have to accept a wide degree of autonomy and religious heterodoxy as they did in Transylvania, which will pretty much make the Slovaks Lutherans permanent.
In reconquered Hungary they will relative easy deal with the local Muslims (kill, enslave or expel), but it will be harder to respread Catholicism as they will lack OTL core and the institutions needed to spread it.