Regarding tours, I think they all are of an aesthetic choice. But also how you view tours from what I gathered.
Gyrospheres are the latest in terms of tech, and I bring this up depending on vehicular destruction. So if it applies to tour vehicles, then this may be the least destructible option with it having a higher health/invulnerability to most dinosaurs. You are mainly seated facing the direction of the vehicle with the least amount of visual disturbances.
Jurassic Tour from claire's sanctuary has a truck like approach, you could be seated facing the direction of the vehicle or either left and right in the back with a roofless view. The vehicle is also really fast to drive around in.
Here is a video of Gameriot's experience with the Park Tour:
Source: https://youtu.be/Q5GKLjP_7Hw?t=760
One thing to take from this is how the cars are more compact than the truck. Besides the 1993 aesthetic, It also appears to not be on a grid. The first RTJP showed this tour on a track, so we may have a version that does not allow for a free drivable option. Likewise, there is that photo of a ford explorer next to the aviary, which could mean that there is a ford explorer option.
I do not think it is a must to get all vehicles, they all provide the same experience based on observation alone. Depends if you like Jurassic Park, Jurassic World, Wheels, or spheres.
Unless they showcase something new with these vehicles, they are mostly aesthetic changes with different camera options.