I wouldn't go near that first one, the ballscrew is 10 mm per rev, not to be confused with a 10 tpi screw, I.E. turns per inch. So it's 2.54 TPI, thats a fast lead. It is also very narrow, too narrow in my opinion. the horizontal load on the z bearings would not produce good results for your application Id think. It's designed for a high speed light weight application.

I think the second unit would be fine for wood but those unsupported rails wouldn't be my pick for aluminium.

Have a look at this one

Z Axis Module for Professional CNC Router 21cm Approx 8 4" Travel DIY | eBay