The top stuff isn't even much cheaper than the bottom. It won't last five years, the stuff just disintegrates. The schedule 40 stuff should still be there 30+ years out. The old school stuff will still be working after civilization collapses 200 years from now. I'm trying to keep my house "old-school compliant" but it turns out that not only did they walk uphill both ways to school, but gravity actually was 20 times more!!! Or something. And they LIKED it!!

I installed the top one and the damn plug wouldn't plug. It had an o-ring and everything, I couldn't figure it out but it would NOT seal.

The bottom one is all "schedule 40" which just means nice thick PVC with standardized dimensions, rather than "one size fits all replace your drain for dummies kit." You have to measure and cut accurately, then glue it together.

The top one is entirely constructed of finger-tight compression joints with every possible corner cut. I mean the shittiest quality possible to make something that LOOKS like a tub overflow, drain, and trap. Just not even ever humanly possible to make something cheaper. I assume the laborers who manufactured it were being extremely efficiently whipped, working 14 hour shifts and living on rice, dirt floor, etc, it's that scroogely.