it is well documented that a split filter print (without dodging and burning) does not give a different result as opposed to a single exposure print. Bassically: a split filter print can also be made with a single exposure!
if your single exposed (not dodged and burned) print looks different from the spilt filtered print you have two prints with different contrast (and base exposure time).
Split filtering can have some advantages:
- when you find it hard to determn contrast and exposure time in a single exposure.
- you have fixed stepped contrast filters and need an intermediate step
- need different contrasts in different areas of the print.
I often use the last technique: the main subject has lost contrast due to aerial haze but I want to bring it with more punch in the print: I make the base exosure and slightly dodge the subject (to keep the whites from becoming gray in the subject) then I burn the subject at a higher contrast to bring in the blacks.