Both the Zace and the Freeca are very reliable. The older Zace is very industrial, really basic interior etc. The Freeca is more comfortable and a bit quieter. The 1.5 liter Zace models are a bit underpowered but the later 1.8 versions are much better. Don’t buy a Freeca with an automatic trans, nor the similar Zace Surf. Slow and thirsty.
Mitsubishi parts and service are cheap. I put probably 300,000km on a Delica van and only did regular service, put new tires on it once in a while, and replaced the clutch once. Toyota are more expensive, but nowhere near VW levels.
So, it depends what you want it for. If you are moving building supplies etc. I’d take the Zace. If you want to carry passengers around and/or care about your own comfort I’d take the Freeca. While neither of these vehicles is built to a high spec wrt to crumple zones etc. they are both better than the typical forward-control van like a Delica or Varyca and they are built on truck chassis.
Oh, if you can afford the price you could look at the Space Gear or that 2.7 liter van that Toyota has. I forget the name but they are very good. Even though it’s an automatic it hauls ass.