It is a variant on it actually. It is set up like this-
The motors would be at the two rear positions.
Everything else are idlers.
The four middle ones would be mounted to the left/right carriage.
If you move the left motor clockwise and the right motor anti clockwise equally, the carriage will move toward the front of the printer ("down" in the view) and the extruder (black box) would not move left or right.
If you move the two motors in the same direction equally, let's say clockwise, the carriage would not move up or down but the extruder would move toward the left.
If you move only one of the motors while holding the other stationary the carriage and extruder would both move making a diagonal path.
I built an Ender4 printer a while ago and it uses the "H" drive method.
It works about as slick as it gets. And it is quiet too.
So I want to try it on my FT5 V1 to remove the mass of the X motor from the carriage.
The only thing a true CoreXY setup (dual belts) really buys you that I can see is that it would be more rigid.
But from what I saw on the Ender, this type of setup works just fine.
As long as the carriage runs true along the Y slides all should be good.
With the nice rails and sliders this shouldn't be an issue, but if it turns out to be one I am prepared to switch to a roller carriage like the Ender has.
We shall see......
The original 20 tooth pulleys yield a basic X and Y resolution of 80 steps/mm (with the stock microstepping setup and motors).
The 16 tooth pulleys yield a resolution of 100 steps/mm, or ~25% finer (depending upon how you care to look at it).
But they also provide a greater mechanical advantage for the drive system because the motor torque acts upon a smaller radius.
So you gain finer resolution and more thrust (for the lack of a better term) for the small cost of two pulleys on Y and one on X.
And I can run the motors a bit faster to make up for it without them even trying hard.
I didn't even bother to change out the idlers at the other ends of the motions and have seen no ill effects doing that.
I suspect that this may be beneficial if I do switch to an "H" drive as well.
Actually there are several such discussions, though mostly for R1 printers.
However the same things apply to the R2 (mostly, because some are now standard features on the R2).