I won't go into the door requirements but I will write a short summary about the vans I've driven for work:
I can't really judge the vito, I only drove one once and it was a wreck.
2001 Ford transit - Feels like it's falling apart, annoying long gearstick, the one we have at work has it's mirror taped to the windscreen, doubts about build quality. Only driven it about 5 times before it was disbanded.
2011 Renault trafic ( opel/vaux vivaro and nissan something) = Cheap interior but practical, soft suspention (but takes less abuse than for example a transporter, slams into a speedbump sooner than a VW), loveley seats ( with armrests). No idea what engine I always drive but these pull lovely all the way to 3000 rpm, you have 6 gears, you can easily make wheelspin when shifting from 1 to 2), bit crap basic spec with no leccy windows, Gearbox feels liek cheese BUT is awesome, you can shift very fast, pedals are nice, not too soft, clutch has a great feel to it. Long turning circle compared to a transporter. You get an extra switch on your steering column for audio control. Small annoyance on all of them (I've driven over 10 individual renault trafic vans from 2010-2011, and they all have the problem), if you don't slam the door hard enough ( it's clearly closed when you look from outside or inside) the interior lights will be stuck on. The car doesn't make a great impression reliability wise or build quality wise, but if you onyl have to drive it, these are definiteley the nciest to drive out of the ones I've tried, nicest pedal feeling, steering, and engine power on the basic models.
2007 1.9 tdi VW Transporter and 2010 VW 2.0tdi transporter: Interior looks nicer, especially the facelift with the screen telling your speed digitally and telling you when to shift, but, less comfy chairs, less practical dash, harder (but better) suspension, easier to maneuver becuase of smaller turning circle, Parking sensors **** up after a while ( we have 3 of these and they all have iffy parking sensors), better spec, VERY CRAPPY PEDALS, over sensitive&light clutch, Over assisted brake& extremely soft brake pedal. Small details are often far better, like the windshield wipers, which are crap on the Renaults and great on the VW's Or the 3x indicator if you slightly pull the indicator stalk. Steering wheel itself looks&feels nicer but the Renaults one feels nicer to use tbh. Gearbox is absolute crap, very tight and nearly impossible to shift fast, if you do, the engien gets some kind of shock, I've stalled the engine numerous times trying to shift quickly from 2-3 at about 22 mph... Engine is absolute crap, it struggles or even stalls at low rpm, and loses all power at 2500 rpm, while the Renaults are nice all the way up to 3k. Very narrow power band combined with a crappy clutch and crappy gearbox. In winter this was also more skid happy than the renaults.
I've driven the (2010) VW and the Trafics from new, they only had 230 and 380 km on when I first tried em.
While I personally love the Trafic/Vivaro/nissan blahblah, far nicer to drive than the VW's, they do not make a decent/realiable impression though. The VW's neither ( i mean they also have their faults, but less and not across the range, more individual problems)) but they make a better impression. But I drive em hard and fast, if it was my own and drove more calmly perhaps I'd perhaps think differently, but my opinion is that the Trafic is nice to drive and the Transporter is a chore to drive.
That aside I've only driven smaller vans, eg. Transit connect or Caddy or Kangoo, but you wanted a vito sized one...
