The Artillery is a dual stepper Z axis, and has a full metal frame.
On first glance, I really like what I see in the JGMaker. Dual Z, Dual Extruder, Direct Drive, all metal frame, Large enough bed (310 x 310), and thr PRO seems to be a very nice upgrade as well.
I’ll look tonight for Youtube videos for additional insight.
I agree about the Pro version. I ordered it. Now, I have to clarify my ambiguous statement. When I said dual Z axis, I was specifically referring to the Ender 5 & printers like it. That is, printers on which the print bed moves up and down. My Ender 5 is a so-called “forklift” design, meaning that the bed is suspended from 1 side, and the other side is unsupported. I now realize it would have been much betterh to buy the Ender 5 Plus, which has dual Z axis frames, so the bed is supported on opposite sides.
The bed, and not the extruder, moves in the Z axis? I thought the gantry (extruder and it’s frame) always moved in the Z axis, like a CNC milling machine.
I’d never consider a fork-lift design, given how unstable this ANET A8 is even with a full frame and dual steppers. I got this for my grandson last year as a Christmas gift. He has not been able to use it, so I recently grabbed it and have been improving it for him (started as a safety update to prevent fires, but turned into other improvements to make it more usable). I’ll have him over for a few weeks this summer and get hi up to speed on it. But this exercise has me interested. I’m an engineer so I like tinkering. 3D printing seems like a very good hobby, as I head into retirement soon.
If you look up the Ender 5 you’ll see the difference. One of the advantages of a rising/falling bed is that the model being printed is not being moved back & forth, where its mass could cause enertia issues. Theoretically, that makes it possible to print at higher speeds. As an engineer, I’m sure you fully grasp the concept. 
The downside is that the unsupported side can lead to deflection of the bed. For that reason, I try to print models as close to the supported side of the bed as possible. At some point, I may upgrade the printer by adding a 2nd Z axis.
Judging from pictures on the Creality web site, the Ender 5 looks like it is conceptually a very solid and stable design, but could benefit from use of 4 Z-axis steppers (one per corner) as opposed to the 2 in the middle of the bed. Is that what you were referring to?
No, 4 steppers would be overkill IMHO. My Ender 5 Pro has only 1 Z stepper. The Ender 5 Plus has 2 Z steppers, across the bed from each other. It also has a larger bed.
I am enjoying this discussion even if I don’t follow all of it.
I’ve been looking at the Ender 5 Plus, and I like what I see so far. Would prefer direct drive all-metal extruded, but it can be changed. Haven’t yet looked at the Pro, but it appears to have the small volume like the Ender 5.
The Ender 5 Pro is the Ender 5 with enhancements: the Creality Silent 1.1.5 control board, upgraded bed springs, Meanwell, power supply, all metal extruder.
Now they need to produce an Ender 5 Plus Pro. 
But then we wouldn’t have as much fun doing it ourselves.