Yes, get a van you can walk around in, and stand up in. That will make the biggest difference on a long tour.
Ford Transits are popular, newer ones much better than in the past.
VW Crafter is a Mercedes Sprinter, with a different engine and gearbox, and a slightly different front end.
Fiat Ducato, is the most popular with the professional companies, as it’s the widest (great for a bed across the van), and rear wheel drive, so the back is less-high off the ground.