The difference between the publisher and Jericho is that if you pay Jericho for an MS assessment - that's exactly what you're getting. They're not dangling the idea that you'll get published. You pay X for Y service and in return get a detailed report on your MS.
The publisher, however, is charging 750e to "consider" your MS - with no guaranteed feedback. They could simply browse your cover letter and synopsis and decide, "not for us". And all done in a half hour. Nice 750e in the bank.
It is a corrupt practice which I've highlighted to a writers' union who said they were "delighted" I flagged this up, agreeing that the publisher is wrong.
It's very questionable. Do they pay decent royalties or give decent advances? If I were going to pay that much for a manuscript assessment I would want full details of what I would be getting in return.