for sure!
Though I'm honestly not so sure, I used to always say BCG before as I appreciated how it was just a traditional grinder (only perfected imo without any threading and with the side teeth in the lid) that would allow more control, not just the choice of plate sizes (witch entail different holes and or teeth) and also the regular or large size options, but how well they work continuously upside down (depending how much I grind upside down, this allows me further control, to get it more fine or consistent, regardless of the plate, though it does change depending on the plate a bit as well) another thing I've always loved about BCG is how pretty the colors are for the anodized aluminum, in that gem cut pattern, part of what led me to collect so many... Also the aluminum is very high grade quality, yet still lightweight even if it's not perfect invincible durability, and they are quite portable if you need to take them somewhere, the regular size of course, but even the large is not bad for mobility I'd say...
I have still not gotten to try stainless steel for the BCG at all, when I bought so many of the aluminum has to factory seconds became first available, customer service chatting with them on instagram, I was promised that they would be sending me one for free at some point once they were ready (at this time they were testing an SS version that would be sized in between the regular and large sizes, also that it might feature a colored aluminum shell for the outside so seemed like that is what I would get eventually perhaps in sapphire) however I had been wondering if I should reach out about these once they launched and have gotten through pre-order fulfillment... Then seeing that they would be discontinuing the polished version, the one that I was much more interested in, finally decided to reach out and follow up asking about their promise... It's been ten days without a response after they saw it, I followed up again so we'll see, just asking if the offer was still on the table and what exactly it was for, did not want to miss my chance potentially to get polished steel BCG (although I would be happy to wait if the other version I described might become a reality someday)
Old Mate is my only stainless steel grinder now (I had United Machining UMG2.0 that I absolutely hated for a variety of reasons well documented here lol and the premium flower mill that is different with its own baggage and no longer ever used) and I am extremely satisfied with it... The size is a nice balance, however it is extremely heavy, and not sleek at all really, so it is less mobile whereas BCG could be considered more of a portable grinder potentially... Of course that is to be expected, and it is really effective, so easy to grind, with the bearing it can almost become automatic (depending on how much it is loaded and how dense sticky the herb is of course it might take some effort to get going at first though the grips certainly help) with such sharp teeth as well, and a great pattern, they are really well designed imo as is the entire grinder truly... However grinding upside down is not an option, theoretically possible but not going to work well in my experience so I do not do it, there is also no other grinder plate option, so the grind depends on how I load it with what, it will vary from coarse to medium to fine depending on the variables of the bud and the load, so that is quite a different experience and might not be so ideal, although the grinding is so nice, quick and easy, that I am willing to compromise and give up some of my control over the grind itself (but yeah I do have some control in how I load it with what as I described so not too bad)
I've had plans to get a second OMD eventually, mine is one of the earlier ones, so it does not have some features and changes that are in the latest models... Thinking I would have him customize plate holes to be slightly smaller for a more fine grind without needing to load fully as much, perhaps a custom engraving on the top since mine now is plain (only a simple old mate logo on the bottom) and finally get the bearing tool, along with the nicer ceramic peek whatever bearing that does not need to be removed for full soak cleaning and spins even better etc. even though it would probably be white instead of bringing the little pop of blue color that I enjoy with my OMD now lol
I hope this helps almost answer your question haha as I have such difficulty deciding between them ultimately since they are not quite able to apples... Perhaps if I had to choose just one grinder, of all that I have currently, I might stick with my large BCG with medium plate (even though I have not used it in quite a while) cover me completely... However I feel so torn, because there is so much I like about the OMD in such big ways, possibly a polished SS large BCG with medium plate could be my ultimate perhaps, so I will have to report back if I ever get the chance to try one!