Really all you need to know is that when it comes to PIP complaints, between E and C, 98% of the time it’s E.
I have yet to see an argument that clearly demonstrates E is superior in any way. I have a hard time understanding why it even still exists, other than inertia of its users and some BS on social media, given how problematic it’s been in recent years.
It should be disturbing enough that something in UGL raws changed that causes this, that no one’s quite been able to nail down, to have second thoughts about injecting anyway.
Pain isn’t inherent to E (pharma E doesn’t have this issue), and should be a warning signal anyone can understand.