Why GA Premium

Data ownership
Unsampled data
API's
Big Query
Data collection latency period is less
Rollup reports; this functionality allows enterprises to view conglomerate data from multiple properties in a single interface and empowers a better understand of the overall picture of your business.
First to receive the advanced reports
Provision to post wishlist for upcoming releases
No data loss; in worst case fermium may cut down few reports

Use demographic and interest data
Benchmark

Apart from click-stream data:

Provission for integration - DCM, DBM; much more reports with 360 degree view
Link AdSense/Ad Exchange/ DBM,DSearch
Integrate GDN; Impression & video views
Extended & adavnced reporting, especially to acquisition & conversion category
MCF, MCT & Attribution models - to uncover opportunities & impact across channels
Create and manage customized Remarketing Audiences, to optimize the spend; then share them with DoubleClick Bid Manager

Link AdWords data & metrics;search funnel
Enable Google Analytics Advertising Features:
so that Analytics can collect information about your users from the Google advertising cookies when they are present, along with the information Analytics normally collects.
In addition to reporting website usage statistics, Google Analytics can also be used, together with some of the advertising cookies(preferences,advertising, process, security), to help show more relevant ads on Google properties (like Google Search) and across the web.


Why GAP/GA for lead generation(Insu):

• MCF, MCT & Attribution models - to uncover opportunities & impact
• In-depth industry insights
• Advanced segmentation
• Integration tips for Publishers