Hi @Elios tough choice. They’re both excellent machines, both get great reviews and appear to produce great prints, so print quality wise there’s possibly not much difference. If we assume Prusa’s multi-colour upgrade works well, they’re also both capable of dual (or in the case of the Prusa possibly quad) colour printing. So the only real differences that matter are the enclosure, the build size and the price.
Enclosed printers supposedly help to prevent warping when printing with materials prone to warp (such as ABS) but I’ve had terrible warping issues with my Flashforge Creator Pro - a fully enclosed machine - and that was solved by using a different bed surface. Since I’ve installed a PEI surface, my warping issues appear to have gone and, since the Prusa uses a PEI bed and they have their new multi-zone heating technology, it’s open to debate how important an enclosure really is when you have the right bed and suitable conditions in the print environment. The BCN has a glass bed so it’s possible you may have the same problems I had with my FF Pro; and at least one user has experienced this:
https://www.bcn3dtechnologies.com/en/forums/topic/sigma-prints-wont-stick-to-print-bed/
Of course, you may be able to solve this as I did, by buying a PEI sheet for the bed, but it does seem to suggest that the enclosure really isn’t the complete solution for warping so do you need one?
Build Size is larger on the BCN, quite a bit larger in fact, but only you may know how important that is. Certainly if you’re looking to print orders from 3D Hubs, the larger the build area, the more orders you’re going to be able to accept. How many more is the important question. The Prusa has a “decent” sized build plate (it’s larger than the FF Creator Pro), and may well be enough for your needs.
Price, however, is a biggy. You could buy two Prusa i3s for the cost of one BCN or, to put it another way, you could buy an awful lot of filament to go with your Prusa for the price of the BCN.
I looked long and hard at the BCN before I bought my FF Pro (which I bought before the Prusa came out, unfortunately) and in the end it was price that swayed me. I could afford the BCN, but it didn’t seem to me that it offered enough to double that price tag, and I’d say the same here in comparison to the Prusa. The BCN is a fine machine, but it’s debateable whether it’s actually any “better” than the Prusa in any substantial way and, more importantly, it’s almost certainly not twice as good as the Prusa.
If it were me, I’d go for the Prusa. I have one on back order that should be arriving in a week or so. If it’s as good as the reviews say it is, I can’t see myself wishing I’d bought a BCN. However, if I had a BCN on order right now, I might well be wondering why I didn’t save myself €1000 and get a Prusa instead…
