As per your demand here I am telling you about the MacBook Air (MBA) as well as MacBook Pro (MBP), as you want.

Here I am telling you about it;

Price
RRP: From £749

Pros
MacBook Air (MBA) is the lightest and thinnest Mac you can get
MacBook Pro (MBP) with Retina has the best spec for your money

Cons
The entry-level price of the 13in MacBook Air(MBA) is just £150 less than the entry-level Retina model and a lot less powerful

Retina MacBook Pro (MBP) offers 8GB RAM as standard, Mac Air only offers 4GB RAM

MacBook Air
Manufacturer
Apple Inc.

Type
Laptop/Notebook/Ultrabook

Release date
January 29, 2008 (original release)[1]
March 9, 2015 (current release)

Retail availability
January 29, 2008

Operating system
OS X

Power
45 W MagSafe2 Power Adapter, AC wall plug and power lead

Related articles
MacBook (2015 version), MacBook Pro


MacBook Pro
Developer
Apple Inc.

Type
Laptop

Release date
January 10, 2006; 9 years ago
(original release)

October 14, 2008
(unibody release)

June 11, 2012
(unibody with retina display release)

March 9, 2015
(current release, 13-inch)

May 19, 2015
(current release, 15-inch)

Operating system
OS X

Predecessor
PowerBook G4

Related articles
MacBook (2015 version), MacBook Air