Both are words with two consonants beside each other so how do you differentiate one from the other. How is Digraf different from Konsonan Berganding or Konsonan Bergabung? In fact there are some which do not differentiate the two but rather present them under the same heading adding to the confusion for student, parents including some teachers. Others differentiate them as follows:
There are only 5 consonant combinations for words classified as Digraf. They are: ng, ny, sy, kh and gh.
Examples of Digraf: bunga, nyamuk, syarat, khas, ghairah
Other consonant combinations give you Konsonan Berganding.
Examples of Konsonan Berganding include: stem, trak, aiskrim, drama and more.
What Is Diftong And Vokal Berganding
More Digraf examples can be found here.
Here is a further explanation about Diftong, Vokal Berganding, Digraf and Konsonan Berganding.