Ask HN: 15' Macbook Pro or 13' Macbook Air for web dev?

Both "maxed out". I do take the train, so the small screen size can be an asset. However, I prefer to use just the laptop screen for development all the time, so having a large screen is nice.

The maxed out macbook air is (disk size ignored because I don't intend to go over 100 gigs).

1.7GHz Dual-Core Intel Core i5 4GB 1333MHz DDR3 SDRAM 128GB Flash Storage

Macbook Pro

2.4GHz Quad-core Intel Core i7 4GB 1333MHz DDR3 SDRAM — 2x2GB 128GB Solid State Drive SuperDrive 8x (DVD±R DL/DVD±RW/CD-RW) MacBook Pro 15-inch Hi-Res Antiglare Widescreen Display

I've heard several people prefer the Airs now, what's your experience been?