How is Macbook Air, Macbook Pro's Solid State Drive compared to Intel or Crucial Technology ones?
The AnandTech Review of the fall 2010 MacBook Air models has some graphs comparing the performance of the built-in SSD to some other SSD drives, including some Intel models. Their conclusion is that the built-in SSD is quite good, though not the best available on the market.

Keep in mind that the storage drive speed is only one factor determining the computer's overall speed. The MacBook Pro models are available with SSD drives as well and will give you better overall speed than a MacBook Air. The AnandTech review of the early 2011 MacBook Pro models includes details about their SSD options, but no direct comparison between the SSDs provided by Apple and market models. They do state "Apple offers an array of BTO (Build to Order) SSD options, however the drives are likely of average performance."