Not as quiet? I'm calling BS. It'* a machined bearing race with bearings and grease. I've never heard a bearing UNLESS it was bad. I don't see what difference it makes WHO makes it as long as it'* made with quality materials and proper machining.
Either way, even with Delco and both bearings, you're talking an extra $200. Your Transport is 8 or 9 years old. Extra cost for Delco boils down to about $25 a year. This isn't exactly the end of the world, but if you keep driving on bad bearings, then it could actually be the end of your world.
Pick one, but get it fixed.
97 SE, teflon wiper blades, Dunlop Sport A-2 tires, Leather steering wheel cover, Pioneer DEH-P480MP mp3 CDRW head unit, Pioneer 12-disc changer, iPod hookup, Boston Acoustic 3 way 6x9'*, Boston acoustic separates in door pods, Alpine 4 channel amp in trunk. Magnaflow dual outlet muffler and Ractive stainless tips. Autozone rice pipe and K&N 4750 intake kit. Clear corner lights. Energy Suspension end links.