I've gone cold turkey from benzos and opiates before. In my opinion benzo is worse.
Opiate WD- coming cold turkey off a three month binge taking roughly 100-140mg oxy daily. I had nausea, diarrhea, restlessness, headache, depression, loss of appetite, anxiety, suicidal ideation, muscle aches.
Nothing I couldnt handle though
Benzo WD- came off low dose xanax after taking daily for a little over a year (1-2mg as perscribed) I experienced nausea, restlessness, loss of appetite, derealization, depersonalization, racing heart, palpitations, hot/cold flashes, inability to sleep, hyperawareness, increased anxiety, panic attacks (worst I've ever had), depression, sense of overall doom, nightmares, chest pain, migraines, hallucinations, suicidal ideation, suicidal actions, unstable moods, bodywide weakness, blurred vision, dizziness...
With benzo WD I ended up in hospital dehydrated with a sky high heart rate and blood pressure as well as extremely low blood sugar.
I would go through opiate WD again any day of the week before benzos, much like I'd go through labor ten more times before dealing with another kidney stone ? I got lucky and had no seizures but there's a good two days that I was so out of it that I don't remember next to anything.