How To Deal With Inconsistencies Between Different Data Sets

Hello, I’ve recently been looking through this subreddit for data on video game sales and the first few I’ve looked at show significantly different information. I know that sales data is not public so information must be collected through things like press releases and may not be fully accurate, but I was wondering:

How would you get over these inconsistencies if you were doing a project and finding a lack of coherence between different datasets?

Does anyone know of any source for video game sales data that is regarded as the most reliable or widely used?

Here are some that I’ve looked at so far for reference:

https://www.kaggle.com/datasets/gregorut/videogamesales

https://www.kaggle.com/datasets/baynebrannen/video-game-sales-2020

https://www.kaggle.com/datasets/thedevastator/global-video-game-sales-ratings/discussion