Technical Abstract: The erosion behavior of clay soils is important for many applications within water resources (i.e. earthen spillway erosion, river channel erosion, bank stability, and dam, and levee failures). The objective of this study was to compare soil erodibility results of two different erosion testing devices: the Hole Erosion Test (HET) and the Jet Erosion Test (JET). Four different naturally occurring fine grained soil materials were used for the comparison tests. Soil samples were prepared in the laboratory, and tested with the 2 devices under similar conditions. The interpretation of the test results was based on a linear excess stress erosion law relating the erosion rate and hydraulic stress. The results from the study indicate that generally the two test methods qualitatively provide similar relative erodibilities for the four soils but quantitatively the HET provides lower values of erodibility than the JET. In order to improve soil erodibility classification, a more detailed HET and JET comparison has to be carried out.