i don't know the exact deluxe differences,
But in general here are a few highlights:
On buses built before august 68' :
The shade above the speedopot is higher than later years
The speedo has the trip counter in the bottom, not sure if it only 68' but i've seen earlybay speedos with counter on top.
The doors have the little pin to lock doors inside (don't know the exact word)
Outside the front door handles are the same as split bus, with push buttons.
The gearbox is one year only, with some beetle parts
there are more but i can't remember them..let us hear them !
Ronnie