I see there is two versions of social grups, one for smf 2.0 and another to smf 1.1.x

My questions is if the version for smf 1.1.x have all the features that the other version had...?

There are a lot of changes between both version basically you can see the new features in the v2.0.3 in this changelog:

[size=4]Changelog:[/size]

! bug fix
+ added feature
* changed
- removed
@ Important Info

SMF Social Groups v2.0.3 - 17/March/2010
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! Fixed Fatal Error 'gc.last_modified' viewing a group.
! Fixed Error Loading Easytabs css and js.
* Added some padding to the Social Groups on Index.
!* Fixed and Changed some HTML Errors on the Search Results Page.

SMF Social Groups v2.0.2 - 09/March/2010
_________________________________________

+ Added SMF 2.0 RC3 Support.
* Now the Leftbar Viewing a Social Group is always in the Top.

SMF Social Groups v2.0 - 05/March/2010
_________________________________________

+ Added Support for Postgresql and SQLite.
+ Added Enhanced Groups Threads, only the members of the groups can post on it and the Group Manager can Lock, Unlock and Delete very thread.
+ Added Group Events with Place, Start Time and Finish Time.
+ Added Tabs Viewing a Group to easily switch between Events, Threads, Comments, Members and Files.
+ Added Enhanced Search and a New Search Page, now you can search by Description, Author, Time and Category.
+ New Mini-Stats Block on Index (It can be disable in the admin panel).
+ Popular Groups, check the 20 Most Commented, Viewed and Members.
+ New Groups since your Last Visit, 7 Days, 14 Days or 30 Days.
+ Mod Optimized now a lot of sub_templates has been moved to new files, all the lists (MyGroups, Categories, New Groups and Popular Groups) has been merged into one single function and some queries has been skipped in case that they aren't going to be used.
+ Added Default Group Image in case that a Group Image isn't added or not exist.
+ Added Advanced Permission System based on Membergroups. (Only for Groups Managers and only in the Group Page)
+ Added Social Groups Version in the Copyright to Give Better Support.
+ Total Curve support including Curve Background, Curve Buttons, Alter Tables Background...
+ Added Preview of the Group Image when you modify the URL
! All the Membergroups Display the same Name.
! Fixed issues with the SMF 1.1.11 Version.
- The Mini-Search form has been removed because isn't necessary as the new version integrates a new Search Page.
@ You can easily upgrade from previous versions just uninstall the installed Social Groups and Install this new package your data will be stored.
@ There are a lot of new amazing features there are too many to be listed here!