The only real difference is the price.
Depending on how many you got maybe look into a rotary like mine, for someone in your situation would be much easier to get them used to it.

I had a 2 dog Val Ward and my dogs sh!t themselves when the ground was taken out from under them and i am simply not strong enough to hold them. The rotary no problems. For my 8 month old pup (now 12 months) i did a trick like coops as listed, i put a rag on the arm in front of her so she walked to get the rag while a dog was next to her. She hasnt been a problem.

Such a smart invention.