Our study aims to compare the effort-aware predictionn effectiveness between text mining based models and software metrics based models. In other words, we want to investigate the prediction effectiveness of the two types of models proposed by Walden et al. in [2] in the context of effort-aware software vulnerability prediction. Walden et al. [2] have revealed that text mining based models outperformed software metrics based models in the context of non-effort-aware software vulnerability prediction. If the experimental results show that text mining based models outperform software metrics based models only slightly, then it would be a good choice for practitioners to apply software metrics based models to predict vulnerable software components in practice. The reason is that the cost to build and apply software metrics based models is much lower than text mining based models. In order to determine the practical value of the two types of models, our study questions: