drupal development

Hi,
i am working on a php cms "drupal".,i want to create a custom functtionality as of comparing various products on a website,i have thought that i would integrate a shopping cart maybe magento,or ubercart for drupal and then add my items in it.but now i am not getting as to how to compare the products once i have entered them in the cart as i cant see this feature available as readymade.
i think some customization has to be done.
please suggest what should i do and and how can i implement this functionality.
example:- i want to finally set a sort of functionality as is available on the nokia website as comparing the features of different nokia phones.
plz help.

Mr. Siddhant Satija,
after selecting the products, you can call the events such as onClick, OnChange or onSubmit and get the data from database and display as you like, it is better to use ajax for getting the database data.

i am already storing the products in the database using a shopping cart,but i am not getting as to how to call the event for comparison as calling the products to be simultaneously displayed in tabular form....can you help with the algo or the program of the function to display comparison of the products..

Hi Siddhant Satija,
you can create a database and store the product features in to that database after that based on your products selection, you can call any event and get the data from database and display.