The iTunes client is famously a resource hog on Windows, which makes it an unsurprising reason why some people choose not to go down the iOS ecosystem route.
SaudiWP7 have taken a hit for the team by actually loading a synchronization client for all 4 major smartphone OSs on their desktop â€“ iPhone, Samsung Kies for Android, Blackberry and Zune for Windows Phone 7.
As can be seen from the screen shot, the the Kies launcher is the heaviest at nearly 20 MB, followed by iTunes Launcher at 3 MB. RIMâ€™s client uses a minimal 1.4 MB, and the Zune launcher a tiny 1 MB.
While the memory usage of the sync client is likely inconsequential to most people, it does show that the care and attention the Microsoft dev team lavished on the phone has extended to the desktop client also.