IPhone
There's no Samsung Galaxy Nexus 2 model yet.
Samsung Galaxy S
I would say Nexus is better because it has 4.0 ICS
The Galaxy Tab 7 inch stands out better than the Galaxy Nexus 7 Tablet.
Samsung Galaxy S3, Samsung Galaxy Note 2, HTC Droid DNA, LG Nexus 4, Iphone, LG Nexus 4, Motorola Droid Razr Maxx HD. HTC Sensation, Iphone 4S and the LG Prime.
There is not much difference but many people prefer the Nexus 7.
Sprint did offer the Samsung Galaxy Nexus during its run.
That really depends on what you want and value in a smartphone, since it is very subjective. However, the Samsung Nexus S is slower than an iPhone 4S but a bigger resolution, but in general, the iPhone 4S seems better.
Galaxy nexus is better
the galaxy tab it better then the iphone because it has hundreds of more apps than the iphone and its battey power is stronger then an iphones.
Samsung Galaxy Y,Samsung Galaxy Nexus Etc.
galaxy tab2 7 better clear expandable memory+ rear camera+ dnla conectivity