In terms of CPU power the i3-380M 2.53Gzh CPU will have a slight performance advantage over the i3-2310M 2.1Ghz even though it's the next generation newer. It's a very small advantage though, small enough to not be noticed in every day usage.
HP ProBook 4530s has several advantages in the stronger HD 3000 on board graphics, a faster 7200rpm HDD and has Bluetooth 3.0. A slight advantage might be the anti-glare LCD screen. It means a 'less bright' screen but also means less glare when you can't adjust the room lights or you have the laptop outdoors in the shade.
Finally, business class laptops have a reputation for having a bit more ruggedness and durability than a consumer laptop.