There are some similarities between packs but most vehicles are different, especially between Modern Combo 1 and 2. The mains differences for the few models that are similar is the paint job, trim and accessories. For example the Ambulance is a fully fitted ambulance with all medical equipment inside while the the minibus has a full set of seats and windows.
But if you are concerned that the some of the vehicles are too similar, you can choose to purchase them individually rather than in the combo packs. So if you only want one Sedan or SUV then you can choose just one you like the best. Although it does work out more expensive to buy them all individually, if you just choose just ones you want then you can save overall.
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