I brought my Bianchi to the shop a couple days ago to replace the rear wheel. They ended up replacing both the hub and the wheel.

Here's the new rear hub they put on: http://i.imgur.com/16MATL0.jpg

And here's my front hub, which matches the previous rear hub: http://i.imgur.com/lS4rHie.jpg

It feels like the new rear hub has a lot more resistance. Should I ask for my old hub back? Is it possible to replace the wheel but keep the hub?