Shout-out to GameSir Support
I had a Scuf controller and a Gamesir controller this year.
I had similar questions for customer support for each. The difference between these responses is why I am a huge fan of Gamesir.
I am writing this because there are always mentions of when customer service is poor on the internet, rarely are there compliments.
1 - Scuf - I had a Scuf controller and the default vibration was very whiney. It was high pitched and a bit annoying. I sent a video to Scuf to ask if it was working as intended. They said, "no we will send you a new one." I get the new controller and it works the same way. I contact them again with a video inquiring about it.
This Scuf rep tells me "I'm not sure if that's normal. I don't own the controller." (!?)
I then returned the controller.
2 - Gamesir - I have a Gamesir G7 Pro. The vibration on the right side of the controller feels weaker than the left.
I contacted Gamesir support on Discord.
The GameSir rep tells me "That is normal. It has different motors. Here, look at mine." The rep then sends me a video of his controller.
Similar inquiries, though Gamesir showed competenance while Scuf unfortunately did not.
Due to the difference in these experiences, Gamesir is my controller of choice.