"differ obviously" is correct and usable in written English.
You can use it when you want to indicate that something has a noticeable difference in comparison to something else. For example, "The two types of apples differ obviously in shape and color."
Different countries' attitudes to rubbish turn out to be just as distinctive as their historical monuments.Countries differ, obviously, in the amount of trash they generate.
(Don't get me started on the clicks of !Xoo, the 14 cases of Estonian, the fact that verbs in Berik require information about the time of day something happened... Languages differ, obviously.
These are 3D pins, which differ obviously from the usual enamel pins you see around.
"But for the most part, left-handers do not differ obviously from right-handers.
Life expectancy is believed not to differ obviously from healthy people [ 10, 100].
The spatio-temporal variations of CO2, Rn, and Hg concentrations differed obviously between the north and south parts of the fault zone.
This differed obviously from the three TF families discussed earlier which were almost up-regulated during the stress treatments.
Having a device that can analyze local water and thermal vents for particle types is incredibly different from a device dedicated to detecting USN submarine activities, and the design of such devices would differ so obviously that questions would immediately be raised by Canada," he said.
Hackett acknowledged that "there will be times where the position of the (Obama) administration differs, obviously, from the Holy See".
Selecting in a random order and with 5-to-1-digit matching both have a random component to the selection of matches, which will obviously differ in different runs.
