the gym I work out at uses beaters for squats and deads and only brings out the Oly bars for the lifts, swapping them out when going for the slow lifts.
I tried to do a Pendlay HD vs Pendlay NG vs DHS today. the DHS won out by a smidgin. The needle bearing felt stiffer in the hand compared to the bushing bar but seemed to turn over better during the clean.
Bare in mind, I only was testing them against each other bar only, not even 5's on the side. And I'm a super noob.
We have an Eleiko, but I think one of the sleeves is stuck so it doesn't seem to spin in one direction. I opt not to use it.