The reason the stat weights differ on HelterSkelter vs Patchwerk is because ES falls down occasionally, and dots/spells are applied without Empowered Shadows active. Any spell applied without ES has an effective mastery stat weight of 0. Obviously this drives the value of mastery down while all three of the other stats go up.
Kelesti: The obvious thing that I like about Newnoise' guide is that it is a great technical guide. My guide is written from the standpoint of someone who has played shadowpriests for a while and is looking for tips on gearing and cast rotations. It is unfortunatley very light on miscellaneous information such as what abilities do or how they work.
There's a part of me that feels there should be room for both guides, or that perhaps the site needs a "beginner's guide" which goes into more detail on what the spells are and how they work. What glyph options there are, etc. etc. etc..
I can work on incorporating more technical information into my guide as time goes on, although I was trying to avoid turning it into a "wikipedia" article on abilities which is what I worry it might turn into if I start adding too much data.
If you see anything that you feel needs to be ported over, let me know. I will try to look over this thread and pull out anything relevant.