Any Orange Peel look is from the paint being sprayed on "dry" vs "wet", on a perfectly smooth, even surface..
I dont know how many manufacturers use robots to paint the vehicle but again, someone is adjusting the machine to duplicate the finish a zillion times a year.
Believe as the manufacturers have had to do more to cut down on emissions, and certainly cut down on costs, you may see more of this on some marques..
To directly answer your question, I dont know why it would be a "lot" different than the rest of the vehicle, especially the pattern, - Unless - the vehicle was hit or something in the transportation to the Dealership and they had to repair it. and didnt look at the match afterwards..
Can you go back there and look at another vehicle like this one and see if this different pattern runs through all their vehicles ?? That would help you decide what you want to do, especially if this is a new car sale and you are not happy...
Good luck..
Dan F