The biggest advantage is that it stays stable longer so you can leave it in longer. Newer cars are going a lot farther between service intervals and are more demanding of a higher quality lubricant.
I'm not sure where I discovered this, but the filter for a 4.3L Chevy V6 mounts to these 3800s and with it'* greater length provides more filtering area. I always ask for a 1990 model because I have a 1990 LE and it'* easy to remember. I can't say with absolute certainty that it will fit other trim models or later years but I use them on my C engine and it fits without any clearance problems. Bear in mind that you'll need to add an extra half quart or so when using the larger filter. My oil change takes 5 quarts. Before, with the small filter, I always had half a bottle left over.