Although both are roasters, their product conceptualization of is quite different and target different customers:
The Coromant is effectively an old-school manual drum roaster, focussing on solid materials, lack of proprietary hardware and hence self-maintainable if something were to happen to owner. It's basically a fully integrated Huky (capacities are similar) with some added flourishes. All the benefits and challenges of a manual roaster at there and integrating it to roast software (e.g. Artisan) is advised to get the maximum utilization from the open platform. There's basically nothing in the design that would to keep you from modding or augmenting the roaster to your hearts desire. If you want to bring automation into the fold, you will need supporting hardware (e.g Arduino/TC4) and some technical knowhow to make it work with Artisan.
The Bullet is more like high-end self-contained roasting appliance with proprietary technology, and you are at the whim of the manufacture as a going-concern (LynWeber anyone?). Its like taking something like a Hottop, nearly quadrupling its capacity, removing the plastic bits and providing more sophisticated automation. Someone can run it without a whole lot of explicit knowledge about controlling a manual roaster, although getting it setup correctly with automation, charging, warmup and other prep will likely require roaster experience or experience from others whom are seasoned with the machine. Built-in automation aside, an advantage of Bullet, IMO, is it's cost and smaller footprint/weight for 1Kg roaster platform (basically twice the capacity in comparison). My 1kg roaster is an near-immovable 200lb beast that lists for nearly twice the cost if purchased today.
07/11/1991, 08/21/2017, 04/08/2024, 08/12/2045