Apple's competitors cram their machines with max spec'd components because compared to Apple, they are lacking the biggest spec of all; desirability.
No amount of RAM, pixels, or gHz can win out over pure unadulterated tech lust. The iPad is unrivaled in that area. eBay is littered with close out tablets from years past, still sealed in the box, for pennies on the dollar. Every iPad for sale over a year old is used, and commands top dollar.
The performance is lacking as well.