The rankings at Forbes can be quite different for the suggested category rankings. For example, USNWR gives Scranton and Bentley similar rankings in the regional category. However, Scranton doesn’t make the top 250 in Forbes, while Bentley is #124.
This doesn’t mean USNWR got it wrong and students should avoid attending Scranton. Instead I’d suggest not focusing on how 3rd parties rank colleges and instead focusing on what criteria is important to the individual student, which will likely be completely different from both USNWR and Forbes methodologies. These types of methodologies usually intentionally try to make the rankings be reasonably close to reader expectations, in an effort to give the appearance of validity, when the actually methodology is arbitrary with no measure or test of validity. This type of 3rd party ranking list can be useful for discovering new colleges you hadn’t considered, but I certainly wouldn’t choose college x over college y because of rankings.