Longer heavier flat oil masks a lot of the difference in RA values. Despite the hype of hook monsters, nothing hooks in true oil, regardless of effective grit. You're looking for effective transition in the limited friction you have to work with front-to-back. All I'm saying is in my personal experience, I can effectively use the Gurus on the fresh, and also as the lane oil transitions throughout the block. They don't seem to be as impacted as my other oilers by cover absorption and RA value changes.
The message from the videos is that even after 20 games with no maintenance, the Gurus hooked more than the comparison balls. I think any reasonable bowler would be happy with the ending hook of the Gurus from game one.
In any case, whatever you throw, if you care about your equipment, especially heavy oil covers, you clean and touch up the surface after every serious use.
Look, I'm not a Radical staffer or amateur Radical homer. But I am a ball whore who throws different company balls with an open mind. There are balls from Storm, Columbia and Hammer I could also sing the phrases of. As examples, the Storm Rocketship and the Columbia Swerve FX are exceptionally good at what they're designed for. I don't understand the chemistry, but the ongoing results (for me) have spoken for themselves.
For oilers, it's hard to find fault with the Gurus, and now the Mix. It's nothing to get defensive about.