@NSK: I feel tempted to say neither one! Both aren't open systems -we know iOS isn't but Android isn't either, contrary to the claims! Google controls it but allows the source to be downloaded.
What is truly open is the up & coming Boot-2-Gecko (B2G) from Mozilla. When I met its CEO Gary Kovacs last year, one question I posed to him was-what is the future of browsers in the world of ubiquitous computing? Do they become irrelevant? Each mobile device has its own browser...
His answer was -well, wait and see. I saw a presentation yesterday, at the Stanford Faculty club where some B2G developers showed what it can do.
I hope B2G enjoys the same success as FireFox.