There are almost 20 Nespresso machine models and they're all made by either Breville or De'Longhi. Nespresso doesn't make the machines, just the coffee capsules.
Breville and De'Longhi uses Nespresso specs to build the machines so one isn't better than the other.
The only difference is the design, so go with the look you like better.
A great way to save money is to get a Nespresso machine to make lattes and drinks like Iced Caramel Macchiatos at home. It's the easiest, mess-free way to make espresso.