Protein powder in general is very helpful in supplementing extra protein intake, especially during a caloric deficit. I typically buy the cheaper stuff since I'm a student, and I never really thought paying twice the price with minimal difference was worth it. Is there really a big difference, like many sales workers try to convince you there is?
To give one of my favourite answers... it depends.
As a student, price is probably one of your main concerns, and if they're doing what you want them to do, then stick with the one you're using.
My friend buys his in bulk from either Bulk Powders or MyProtein (UK based), and they do him fine. They help him hit his protein goals and help reduce muscle soreness after a training session.
For myself, I've found that the cheaper brands that he uses can play havoc with my digestive system. I never figured out what it was in them that caused issues, it could be an intolerance to whey, it could be the sweeteners they use in some, it might be that I'm celiac and there's something in the packing process that contaminates them beyond my ability to tolerate. Whatever it is, I pay more for a vegan blend I've found that only uses a few ingredients and causes me no issues. For me, the extra money is worth it.
It could be that you find you can get your protein requirements in by buying cheap cuts of meat (the secret is to cook them for a loooooong time), tinned fish (I'd recommend sardines, not tuna) or cans of chickpeas if you're that way inclined, in which case, the protein powder probably isn't worth it to you.
I'd recommend experimenting (I think most companies do samples of protein powder fairly cheap), you might find that you're willing to pay a little more for one that tastes better.
(Just don't try unflavoured hemp protein, it's honestly one of the most disgusting things I've ever tried to stomach, plus when I dropped some on a tea towel, it bleached the colour out of it. I find that concerning.)
Firstly it's hard to answer your question based on the information provided as it only asks about higher versus lower prices and not about the types of protein you are looking at. Pricing for any products can be decided for a number of reasons and the most common being perceived value. That being said price alone doesn't necessarily determine the quality of the product especially in the supplement industry with so many competing products all boasting to be the best quality and very few standards that are easily measured by consumers.
As far as my recommendation for protein I would suggest looking at egg based protein powders. Eggs are the most complete form of protein and compared to whey of any quality will be superior as most whey proteins are of cheap quality despite marketing around them. All the best. Stay strong!