Thanks!! Speed indeed would be nice. Could go for 3.5 then. the enclosure looks better and keeps dust away from the buildplate. I think i will eventually go with core one then.
Because of things like acceleration and flow limits the scaling isn't as simple as a constant factor but also depends on the geometry of the part (sharp corners lead to slowing down) and material (check max volumetric flow in your slicer, will likely be set way too low for your current filament profiles, especially if you switch to a high flow nozzle on the nextruder).