None of the newer keyboards have the soft touch of the old-fashioned MBP keyboards, frankly. Here's a summary of differences that I can remember:
Old Pro keyboard vs new 'chicklet' keyboards
- The "old fashioned" pro keyboard of the 2007 15" MBP has no empty space in-between the keys.
- Whereas the new keys are merely flat, the old keys were "hollow".
- The pressure point is lower, thus pressing the keys is 'softer' or 'easier'. (old keyboard)
- If my memory is correct, the old keyboard was also a quieter, but over all every mobile keyboard Apple has made has been very quiet. So this is not an issue.
Since all of the unibody (retina) Macbook Pros/Airs now have the same keyboard design, the typing experience is fairly similar. Other factors become more relevant when judging the subjective experience:
- tilted typing angle (Airs)
- larger palm rest area (15" Pro).
- cold surface due to more efficient chipsets
I have worked with a 2007 15" MBP, 2007 13" Macbook, 2011 15" MBP and 2012 13" MBA.