Is the 860 PRO worth it over the 860 EVO?

Only if you value endurance. The PRO uses MLC NAND with a much higher write rating, but both are SATA drives with similar everyday speed. Most casual buyers are fine with the EVO.

Will it fit my laptop?

It is a standard 2.5-inch, 7mm-thick SATA drive, so it fits most laptops and desktops with a 2.5-inch bay. Very thin or newer machines may need an adapter or only accept NVMe drives.

How fast is it compared with an NVMe SSD?

Sequential reads top out around 560 MB/s, roughly a tenth of a fast PCIe 4.0 NVMe drive. Boot and app loads feel quick, but large file transfers are slower.

What is the endurance rating?

The 256GB model is rated at about 4,800 TBW, which is very high for its size thanks to MLC NAND. That suits heavy write workloads.

What comes in the box?

The drive itself plus documentation. No SATA cable, screws or mounting bracket are included, so check what your system already has.

Can I use it in a PS4 or NAS?

Yes, it works in a PS4 and in most NAS units with 2.5-inch SATA bays. Capacity is the limit for games, and NAS use benefits from the endurance rating.