OG Stark seems to give me more external results but more recon and less cognitive benefits compared to Stark Black whereas Stark Black gives me max intelligence benefits but less external results. Like on OG Stark I could suck and things will still go well and how I want things to go. Can’t say the same about Stark Black 
This could be also because I haven’t ran OG Stark consistently for 2 years so maybe I just need to push through like I always did. I had the same kind of issue with OG RICH back in the day and then after a month it stopped and I only kept seeing results (those manifestation results to this day we’re unreal. It felt like a video game hopefully EoG: True Sell brings that back).