there you should be a review of them [video]..
i remember puran,but didn't know exactly when to use piozr..boot-time,regular scan?
and auslogics lack boot-tim...
Well I've tried defraggler,ashampoo,iobit (they also lost my trust due to the mbam situation) ultimate defrag, my defrag (hated it) and auslogics, and I have to say auslogics is my fav!