The easiest way to check if its actual wheel rubbing is to get a flashlight and look all inside the wheel well and on the tire surface (mostly near the corners) for linear striping marks. Shouldn't be too hard to spot. If it's too dirty to see any marks, you can also try dusting the inside of the wheel well with something like foot powder to make any rubbing more visible (just an idea, not something I've tried, and conditions could certainly make this a non-workable technique).
As a real answer to the question, I'd advise that you read jwh20's comment on your other post. Yes, struts could be the cause, but there are many components to the front-end suspension system that could cause these kind of issues. Try to find the best mechanic in your area and have them look at it. It could be something cheaper than struts, and it could need more than one thing.
I'd also advise trying to recall when the issues started happening (the wheel shuddering and rubbing sounds). They could be interrelated, and something like hitting a pothole, or even gently rubbing a curb could have caused damage. If there was some particular event, that may help greatly with the diagnostic process (either online or in a shop).