I rushed to the NuPrime to see the specs you mention, but I find that this way of adding products to a page is very unprofessional! I'm sorry but if the sole difference from the ST-10 to the ST-10M are the back panel and the inner parts, to just copy / paste the front pictures without providing the other photos is a joke on the visitor.
Also, the description praises the 'true' 300W from the power supply yet the power rating reads 230W (which may be right) and the gain reads: ____ dB, which I'm sure is wrong. The review section has awards going back to 2015 when the product is not yet available (which sounds like a copy paste) and the FAQ forum also points to the ST-10 thread.
So I am really disappointed in this approach: let's announce a product we don't have yet, let's say you can upgrade the old one... ups, no, you can't, still, we'll put the product on the page without any 'hard' info, but just self praise of what the product is going to be.
That doesn't seem to me like a serious approach, and I love nuPrime products.
I'm not going to be popular with this post, but I think the quality of the products deserve better attention to these details.