I don't have data yo back this up, however
I feel like EDG are kinda scrimming just to scrim. They are playing weaker(they win every toruney in thier region without much hassle) Chinese tier two competition and just shit on them without gaining valuable insight about their flaws - or without having coaches who can extract this insight.
Sen was playing FNC in Madrid and plays M80, OXG etc. at home. These are teams that they can't just shit on, hence they get a lot more valuable info. I think the closer mechanically you are to the teams you are scrimming, the harder you try in scrims and the better coaches you have, the more you extract from scrims.
As with many things in life
Progression ≠time
Progression= attentive and productive time