No, it isn't. while i agree that the air still is the best buy, the rmbp 13" has a much faster processor, better baterry life, better screen, more ports and loses 0 on design.
Also since it was found that the rmbp has free space inside, maybe we can have a discrete graphics card next year.
Yet the MBA and rMBP benchmark scores are identical.... The processor on the MBA is slower at clock speeds but it does boost up to 2.8 once needed, which rMBP goes to 3.1.
Battery life on the MBA and rMBP are also identical...