Note for application performance (as opposed to Data Usage), OS X seems to scale a lot better than my Windows 7 system (more effective use of shared libraries?

Note for application performance (as opposed to Data Usage), OS X seems to scale a lot better than my Windows 7 system (more effective use of shared libraries? I have no clue). I've got a Dell Desktop with 16 GB of Ram - and, when I have roughly the same app load as my MacBook Air with 8 GB of Ram - the Windows 7 system starts running low on memory (Google Earth is a common culprit), whereas I never seem to have memory pressure with my MacBook Air for baseline application usage. Obviously, applications that need the data space (as opposed to executable), will greatly benefit (Oracle, Scientific Apps, Analytics, etc...) - but my 2010 MacBook Air continues to be a rock solid performer with an average of 20 Apps running. I will certainly benefit from the greatly increased SSD storage performance, but I'm not really that interested in a 16GB system anymore. I used to say I was going to hold out for a 16 GB MacBook air to upgrade, but, the reality is 8GB is sufficient for my reasonably power-user-intensive ways.