I believed it was cast but if the owner says sintered, sintered it must be.
This is a great idea and fantastic list - I also wish this list existed earlier...
I also argue, that the current production of Weber PH should be ranked more aggressive. I will get an ATT R1 soon and take it from there. However the current? Weber has a blade gap of .82 mm as reported by me and another member independently - while the DLC and older PH??? have a gap of 0.61:
http://wiki.badgerandblade.com/Double-Edged_Safety_Razors_Ranked_by_Blade_Gap
Mine definitely does not have any issues with the blade being wavy etc. and is a great shaver - but definitely not mild. Smoother (better feel on the skin, no irritation) yet far more effective (closer, longer lasting) shave than the 37C IMO.
I think there should be some effort to try and identify which head geometry of the Weber people are using. I have read many times, that the Weber PH head is the same as the Weber DLC. For those who have this version of the Weber, this sounds like a mild razor. The Weber I have (bought at the beginning of June 2014) is definitely not the same as the DLC head - as the difference in blade gap shows.
I know the blade gap alone is not an indication of the aggressiveness - it just shows, that there are different Weber PH head geometries out there...