Tucson has a lot of space and the seats are comfortable. If you have people sitting in the back regularly, they get good legroom and a reclining seat. The diesel is the stronger engine of the two and the petrol is more relaxed. Some people may not like all the touch controls inside. It is also quite wide, which can be irritating in crowded areas. Tucson is no longer sold new, so check the car properly and go through its service records if you are buying one used.
If you want a five-seater SUV with lots of space, the Tucson is worth checking in the used market. You don't get a third row here, so most of the space goes to the five seats and luggage area. Signature also has quite a lot of features, including ADAS and ventilated seats. Those looking for diesel can also find the HTRAC four-wheel-drive version. Before buying, check when the car was serviced and whether there is any repair or accident history.