Several international standards-makers have emerged with different global standards and guidelines for how CSR-related issues should be presented and what should be included in sustainability reports. Several previous studies show that CSR reporting differs depending on which country the company is in, while information regarding one's activities and reporting differ. The purpose of the study is to investigate the application of international standards, specifically GRI Standards, and whether the application differs internationally by examining companies in Sweden and USA respectively. The study is also intended to investigate international differences regarding disclosure about the topic specific GRI aspects. The study uses a deductive approach and performs a quantitative content analysis to compare 60 sustainability reports prepared in accordance with GRI Standards. The study consists of companies from the US and Sweden and uses descriptive statistics, a t-test, and a z-test. The standardization efforts may have succeeded but this study provides information which indicates the continuity of international differences in sustainability reporting despite the use of international standards in the companies that were studied in Sweden and the US. This is a sign that there is still more to do to highlight the challenges against standardization efforts.