Which one is longer, the Multivan or the Caddy Maxi Life?

Both cars are very similar, the Multivan is 12cm longer than the Caddy Maxi. But inside, they offer almost the same boot length - 225cm, making both good cars for sleeping in.

Which one is better for camping (sleeping in) - the Multivan or the Caddy Maxi Life?

I give the edge to the Caddy Maxi Life - it is almost as big as the Multivan, but costs more than half the price, offers better interior storage options, and has much better consumption/mileage. Its seats aren't as practical and versatile, as the Multivan's, but they do come close and take less room in the car, making it an easier occasional camper, at half the price. It makes more sense to buy a Caddy Maxi Life for everyday use and some camping given its price and consumption, manoeuvrability and very comparable size to the Multivan.