For all the difference that third party defrager`s make it`s not worth it, Windows 7 does a good enough job for the vast majority of users, more options for Windows defrag can be found easily at the command prompt;
/A Perform analysis on the specified volumes.
/C Perform the operation on all volumes.
/E Perform the operation on all volumes except those specified.
/H Run the operation at normal priority (default is low).
/M Run the operation on each volume in parallel in the background.
/T Track an operation already in progress on the specified volume.
/U Print the progress of the operation on the screen.
/V Print verbose output containing the fragmentation statistics.
/X Perform free space consolidation on the specified volumes.
Windows 7 still accepts these Vista switches.
/R Performs partial defragmentation (default). Attempts to consolidate only fragments smaller than 64 megabytes (MB).
/W Performs full defragmentation. Attempts to consolidate all file fragments, regardless of their size.
/F Forces defragmentation of the volume when free space is low.
example; defrag C: /V /W
Personally speaking the need for third party solutions with 7 is just a myth, they may improve some aspects of the drive performance, or worse conflict with Windows own routines, and any performance increase will be imperceptible to the average user on a standalone machine.
Differing algorithms just give varying results this is why you will always see more fragmentation when using third party solutions. A whole industry has grown up around this subject, and let`s face it if they all reported that Windows was now doing a good enough job it would hardly be in their best interests.