No I wasn't aware of that. However, based upon the threads stainless razors can be a bear to sharpen. In this case for the INOX blade, the website states that they are tougher to get a good edge on compared to carbon steel. On the other hand, they also state that with a bit of care they will take a wicked edge that lasts. We'll see.

Of course the main point of the story is the importance of learning on a truly shave ready razor to be able to judge when it is properly honed.