Can't seem to find any sites to explain what a TB6560-V2 as opposed to a TB6560.

Considering these two purchase sources for a kit and wonder what I would be getting for the extra money for the first one with the V2.

The second one has a bigger power supply and is about $40 less.

4 Axis 1.9Nm(269oz.in) Nema 23 Stepper Motor & TB6560 Driver Kit|US122|4 Axis CNC Kits

USA Free Wantai 4Axis Nema23 Stepper Motor 57BYGH633 270oz in 3Axis Driver Board | eBay

This is for a 1500x1000 OX, for wood, using Mach 3.
Ox CNC Mechanical Kit - Large - Maker Store USA

Thanx, Alan