Rumor has it that the factory making the cabinets supplies many, many of the speaker companies around the world. Some have noted similarities with the cabinets on Perlisten towers....maybe because their ebony finish looks so similar to the ebony finish on the BMRs???
I've owned Salks and BMRs. The woodworking and finish on the Salks reminds you of the best furniture cabinetry you have ever seen and something you would be proud to have in your living room.
The BMRs are somewhat different...almost reminding me of a finely finish automobile, super high gloss and appearing to be jointless with their rounded corners and super high gloss.
In both cases, people would walk up to them in my home and just marvel at the finish...different but both fantastic.
I don't have personal experience with the GR Research products...but like Salk and Philarmonic, they also have a great following and a reputation for great products.
To my way of thinking, its not one vs the other....or one better than the other...it is what fits your ear, your room and your eye.