92 Jetta turbo diesel oil filter question

I don't think there's any advantage except price. When I was putting my ex through college, and I was poorer. I found the cross reference by accident looking through oil filter catalogs in Murray's. ( Yea I have no life.) The Ph 3569 doesn't cross reference with this filter. But one of the filters it cross referenced with , does cross referenced with a common GM. I think it was an PF4 or PF 2. And that cross referenced with Murray's house brand. Which was usually 99 cents to $1.99. So I used it because I had options to get whatever cheap filters were on sale. So I checked them side by side in the store, tried it and it fits. Its exactly the same size and same threads. I showed the cross references to the Murray's guy , and they gave me the I don't know why. But if you looked inside you could tell the filters were different. No spring in the GM. Later, I figured out about the back flow or bypass valve and stopped. But at the time I was changing oil every three thousand miles and leaking , burning a quart every 500 , in a

Agree. I was going to mention the reasons of the valve but your post has all the info needed. I just don't remember using a filter without a valve. Interesting that there is such a thing.