Bed slinger vs coreXY 3D printer

I have found that I can actually get more reliable quality out of bedslingers just because the frame tends to be more rigid.

However they are definitely slower. And if you are printing certain tall, narrow models, the bed movement can cause print failure from the motion knocking it off the build plate.

The Prusa XL doesn't lack rigidity. That thing is build like a tank. It feels a lot sturdier than the Prusa Mk4.
Then again, I guess they're not in the same category...
One of the most prevalent mods for my old i3 clone is a z-brace, so...
- I have z braces on my bear modded mk3s too, things reliable as heck and easy to service.

At that printing speed I doubt it makes any difference if the bed is moving or stationary :) Surely the Prusa XL could go much faster than this?

With those flat plates I'm printing, there's zero difference. But when I have to print tall thin things, like for example a long tube to adapt diameters, it's doable without any support on the XL, while I need a gigantic raft and glue on the Mk4 - and even then, it shakes enough that the diameter is not that great at the top.
Also, the XL has two heads, so I can print TPU with PLA support.
I haven't tried pushing the speed yet. I've been playing with multi-color and multi-material prints, as well as long tall thin prints that were kind of impossible on the Mk4. And when I'm not playing with that, I'm running it almost 24/7 because I have to produce sets of parts for our production floors asap and each set takes about 20 hours.
But soon the machine will be more available and I'll play with it some more.
- Was just thinking that if the goal of your video was to showcase the difference between the bed slinger and the corexy, then it would've made a stronger point if you took advantage of its full potential. The MK4 even looks faster in the video, but I suspect it could be the angle and that the bed moving making its motions more visible.
- Speed on a core-xy, especially acceleration, can be a ton higher than a bed slinger. I have a 350mm^3 Voron keep a 0.6mm nozzle on it, and print with 0.9mm line width and 0.3mm layer heights. I have a Rapido HF and volumetric flow winds up being my bottleneck most of the time.
  Also note that when you're going fast, material matters a lot. I can melt ASA faster than PLA/PETG. But... ASA can be a bit more melty so things like overhangs can suffer. And the whole needing a heated chamber thing.

One difference is machine size. A bed slinger needs enough room to sling the bed around. I have a Snapmaker Artisan and its humongous because of this.

That's true. The Prusa XL is larger than our Prusa Mk4 with the enclosure, but still fairly comparable. However, the XL's build volume is kind of... staggering in comparison.

I think the pros/cons come down to what you need a printer for. If you print mostly flat things, a bedslinger is fine. If you print large parts with sketchy bed attachments like I often do, a coreXY makes a lot more sense. You have no idea the amount of filament I wasted on giant brims and rafts to keep parts from flying off the sheet - not to mention the time it takes to print them.
And then of course, the Prusa XL in particular can be outfitted with up to 5 separate extruders. It has nothing to do with coreXY but it was a big part of why we bought it.