It's a bit surprising, since they're inferior choices. And they're also being offered at the same price as before, with no discounts. But those older Pros offer a few minor advantages. Even without a price cut, they're more affordable (slightly) and they support a variety of older ports (USB 3.0, Thunderbolt 2, SD card, HDMI) without dongles. They also use the easy-to-detach MagSafe power connection, and they at least have Force Touch trackpads (but smaller than those on the new Pros).
But the new MacBook Pros seem like the better bet across the board. They're significantly faster, smaller and lighter, and most have that new OLED touch strip called the Touch Bar, as well as Touch ID (the entry-level 13-inch MacBook Pro, however, doesn't).
How do you tell the difference? On Apple's purchase page, the new MacBook Pros are labeled "new." The legacy models -- one 13-inch, one 15-inch -- hang out at the bottom. Also, the older MacBook Pro is only available in silver. The new Pros come in silver or space gray.
Check out the rest of CNET's coverage of all of today's Apple news.