I have both on my stern. I think the 'ladder in the tube' comes standard on many European production boats but I've not seen it sold locally.
It can be quite tricky to stuff back inside so I tend to not use it and save it for an emergency.
The black plastic steps from Whitworths are very sturdy and show no sign of deterioration after nearly five years of exposure and use. They are good for climbing out of a dinghy but if I need to get aboard from the water, I use the telescoping ladder which hinges off the back of the swim platform. Not much help if the platform is raised though!