How were they in any way equal, Neshoma
The 'poor' dad got up at 4am 5 days a week to start work at 5am. The 'rich' dad did the commute once to see what it would be like and was back by the middle of the day to try out budget supermarket shopping.
The 'poor' dad or mum would have had to chop up and lug the sofa to the tip themselves - making 5 or 6 trips - while the other adult looked after 6 small children. The 'rich' dad had the help of 4 of his teen/adult children plus his wife to get it all there in one go with nobody needing looking after at home.
Psychologically, there is no comparison either. The 'rich' family knew they were going back to their very comfortable lives in just a few days and had the mental and physical energy and motivation to do something nice for the other family. They weren't worn down by years of 'same old same old' poverty just gone with no change to look forward to in the forseeable future. Instead, they were fresh, well rested, coming from a background of having the time, means and energy to deal with jobs and problems as soon as they come up and probably knew it wasn't long till their next luxury holiday.
If you're put into a house with your family and given £110 for the week it's no problem, is it. You do a week's budget shopping and don't go out much or do any activities or shopping that week. Easy. But if that's your life every week and there's never a meal out, a trip to the theatre, a holiday or a shopping trip to look forward to then it's a very different thing.