For one because there is no evidence of it. Apple are secretive but at some point you have to take a car out on an actual road to see how it fares. And get government permisison to do so. The fact that Apple has done neither leads me to suspect Google is further ahead.
This logic is flawed. If you want to test something secretly you do it in plain sight and use mis-direction. Buy some Tesla vehicles and put your electronics inside -- can you tell who owns the software and hardware inside when looking at the outside? Use a Chevy volt for the really juicy stuff, nobody will even blink. If you need to test a fancy new sensor, buy a white car and slap Google on the side, everyone knows Google is testing this stuff, so meh!
Android was in development and publically known about for years before Apple unveiled the iPhone. Now all new phones are basically large touch sensitive screens.
Yes, but the regulatory and development hurdles involved in developing an operating system are significantly different to those of developing an autonomous vehicle.
That's a silly assertion to make. Apple is well known for secrecy, and any prototype vehicles driving on the streets are not likely to be branded with their logo. How do you know they aren't already driving vehicles on the roads?
Also, whether they are currently road testing vehicles or not, that doesn't change the fact that Apple is increasing R&D spending.
