Those BAFX look like my $20 Walmart poles, Swiss-Tech or something. Aluminum, twist to lock, etc. No problems.
But I caught those Black Diamond z-lock distance poles on sale for $49 at Steep & Cheap, and there is a huge difference.
They fold up much smaller, they are much lighter, therefore they find their way into my hiking and backpacking gear more often. They came in a very useful pouch which was mesh with nylon.
I'm fairly heavy, even without a pack, so at first I hesitated to put full weight on a pole, but confidence in them grew. So I keep the BDs with my Camelbak, and the cheaper aluminum ones are in the car.
I wouldn't skimp on something that I planned to use with every step while hiking or backpacking. Every step counts.