I have a Trend and formerly owned a small 17' Pleasureway Class B on a Ford E250 chassis. They are very different vehicles with different strengths and weaknesses.
We ran into Russ Garfin from Winnebago at an RV show several years ago while looking seriously at the Travato. After a brief discussion he pointed us to the Trend. We looked at it and were impressed, but were both pretty firmly against it because of how big it seemed. Fast forward a few years and after looking at Class Bs exhaustively we concluded that the Trend was really the best option for a family with kids and we would just have to live with its limitations. We even started looking for a Class B to go along with it so we could continue to enjoy the benefits of both! After a few months of owning the Trend however we ditched the idea of getting a second class B to complement it. It does have some limitations but they were far less than we feared and not enough to justify a second camper.
In terms of driveability the Trend (with SumoShocks) is much better then anyone should reasonably expect it to be. Even at 24' the incredibly tight turn radius of the ProMaster chassis makes it easy to do U-turns anywhere you have at least three lanes of width. I have never compared it, but I'm pretty sure it has a significantly tighter turn radius than my 17' Ford did. That, combined with the large mirrors and backup camera make it quite easy to manuver in tight spaces.
The Ford, even though it was 2WD and had pretty low ground clearance, was significantly better offroad. The Trend is a heavy vehicle and it will get stuck easily on soft ground (I know this by experience). It has great ground clearance everywhere but the rear axle, however the long rear overhang makes uneven roads a bit too much of an adventure. How much this limits you depends on your style of camping. I doubt a 25' MB Class-B van would fare any better in most circumstances, and some of the limitations of the Trend would apply to most ProMaster Class-Bs as well (the weight, the low rear axle, etc). If the dirt road areas you navigate are passable by those types of Class Bs you could probably bring a Trend along the same route.
Parking was unquestionably better in the 17' Ford. That being said, although I sometimes have to look longer for parking I have almost never found myself unable to find it in all our travels. The far bigger limitation in terms of parking comes from cities with a "No RV" parking ordinance, a "No Vehicle Parking over 19" ordinance, or parking lots that specifically forbid RVs of any length. I run into these far more often than I do space challenges with parking the Trend, and they would apply to any Class B that was not stealth.
I almost always back into parking slots (it is safer because you always have the best situational awareness when you first approach a parking spot). With this technique I regularly fit the Trend into ordinary spots even in dense urban areas. The Trend is only as wide as its front running steps and has the same stock side mirrors as every Promaster so it fits fine in pretty much any parking spot I come across. The key is to have an area behind the parking spot that I can hang the tail over. These are usually available on the edges of lots, or sometimes when a lot has a raised grassy area between sections. In these situations the back wheels can be brought all the way back to the parking stop and the front fits fully in the space that a normal vehicle occupies (e.g. it doesn't stick out any further than the other cars).
For parallel parking I find the Trend to be as easy or easier than most vehicles. You need a bit longer of a space, but the tight turning radius and backup camera let me fit into spots that are only just a bit longer than the Trend itself. Fold the mirror on the traffic side and it works great. I live in the NE where parking slots are routinely shorter and narrower then they are in the rest of the country and successfully park in all sorts of urban and dense urban areas without much difficulty.
In terms of usage I would say that we used our 17' Pleasureway as a daily-driver all the time, and thought nothing of picking it for any sort of day trip we took. That's not the case with the Trend. I do drive it for errands when necessary, but the extra effort of maneuvering a larger vehicle makes me lean towards my other cars more. We take it for long day trips, but not for short trips to the park. This is partially because the absorption fridge is near-useless without an extended time to cool down. Having a compressor fridge was a key advantage of the 17' Pleasureway as we could put stuff in, turn it on, and it would rapidly cool down before the food started to warm up.
On the other hand, we never seriously considered anything other than vacation trips in the 17' Pleasureway. We have taken several month long trips in the Trend. The extra space makes it so much more livable. In fact, we have even used it for multiple months - something we never would have done in our Class B. The Trend is a virtual palace compared to a Class B on the inside, especially on a rainy day with children! The near-full-length awning provides a lot of protected outdoor living space in wet weather too.