i was under the impression European Ryobi tools are made by the same company as M12.
TTI( parent company of Milwaukee ) owns the AEG power tool brand, and has rights to the Ryobi name for power tools sold outside Japan.
Tools sold in the USA under the Ridgid brand are in many cases the same tools sold in Europe or parts of Europe under the AEG brand.
TTI produces tools for both the US and European market under the Milwaukee brand, and uses Milwaukee for its top of the line products. AEG and Ridgid brands are now used for the mid-tier products, with Ryobi used for the lower cost products.
Despite the tools coming from the same corporation, the technology used in the tools is not always the same, and the tools sold in different markets are sometimes completely different products.
For instance, there are Milwaukee models sold in the US which are completely different from those sold in Europe, and vice versa. Cordless jigsaws were one example.
I believe Milwaukee and Ryobi were also both selling hydraulic impact drivers at one point, but with separately designed impact mechanisms.