Ok first off Not all closed-loop drives are equal.!! (or motors)

I haven't used those drives or motors so this doesn't apply to them at all, however, In the past, I have used drives that look very similar (probably come out of the same factory) and wasn't very impressed.
The reason is two-fold, firstly, compared to the Lichuan drives I use now they gave much rougher stepping action, mostly down to the way they handle resonance I believe.
Secondly, they gave lower torque at higher RPM, which I believe is down to how they handle the current/volts combined with resonance plus only allowing 50V max. They struggled much past 1500rpm which is where the extra volts come into play, the 4.5Nm Lichuan's I use now will happily shift a 40-50Kg gantry with 10mm pitch screw between 20-25Mtr/min using 55Vac which translates to 2000 to 2500Rpm.

Regards the motors then most closed-loop steppers are pretty much the same motor as a standard stepper, just with an encoder fitted. It's the drives that make the difference.
I say most because some are better than others and again I find the Lichuan motors to be made just that bit nicer than some others. Also, you have 3 phase steppers and these are different animals altogether. They are smoother and have more torque and spin faster, unfortunately, you don't find many in nema23/4 with much above 3Nm ratings and 50Vdc drives, that said they will easily match a 4Nm 2 phase using the same voltage.

On large machines like 8x4, or 10x5, I fit 10nm closed-loop Nema 34's with mains voltage drives and they stop for nothing and spin crazy fast. Much faster than same size 2 phase motors.

These days I nearly always fit drives that allow AC voltages for simplicity and cost savings, I have run them on both AC and DC using toroidal transformers with smoothing Caps and can see no difference in performance. Now I just hook them up to a 55VAC transformer(toroidal) and away they go.


Have you considered looking at DC servos.? These spin plenty fast, usually 3000rpm + and give constant torque with lower voltages like 48Vdc.
Something Like these https://www.ebay.co.uk/itm/283050605...AAAOSwKJhbRIeE

They are low torque but it's constant across the RPM and they will spin up to 4500rpm with no or low loads. This will work better with your ratios as you'll have far more torque at the higher rpm's than a stepper will have.

Other than that then I'd say spend a little more and get a 200w AC servo with a brake and do the job right.!