It should come as no surprise that Apple and Android are the two "most desired" smartphone systems, according to a new Nielsen survey of mobile phone users. But the results vary a bit based on the people who were surveyed.

Among current smartphone owners questioned by Nielsen, the survey results out today show that 35 percent are looking to buy an iPhone as their next device, while 28 percent plan to go for an Android phone. But among those who currently own a feature phone and want to upgrade to a smartphone, 25 percent are eyeing an iPhone and 28 percent will likely opt for an Android device.