I commissioned the first MIE ripper and helped design it (based on features of several rippers I'd seen for big excavators and adding the scoop function).
I had looked at the Brotek but thought it was too light for my Woods BH90x and was concerned about the lack of substantial lateral gussets to support the blade. Remember, the Brotek ripper was originally designed for the
BX23 which has a very light weight BH. I suspect the Brotek would work fine for six or seven foot BHs but I wanted something more stout for a nine foot hoe on a heavy 40hp CUT (DK40se). Having used the MIE for one season of work I can say that it is clearly more solidly built than a 9foot BH could ever conceivably damage. I like the 24 inch depth and the fact that the scoop on the back acts kinda like a combo plow/shovel and helps remove spoils so that a second pass can go deeper without stopping to remove dirt.