O&O Defrag vs Perfect Disk 10

I am planning to buy a defrag utility and I found that these two are the best but I am having difficult in choosing one because there aren’t any independent comparatives

Your insights will be appreciated

O&O is good if you’ve been maintaining all along. If things are really bad, 50%+ fragmentation it’s less effective even after multiple passes. Vista and 7 practically take care of themselves. Older OSs do OK with the default (usually Intel) installed program. ABN = anything but Norton unless you like all day disc spinning.

PerfectDisk 11 will be release soon, this is the best defrag tool that you can use in its area. But is “shareware”. You need to defragment your hard drive as well as your registry. To obtain good results in file system performance. Also, another good option is TuneUp Utilities or System Mechanic. I recommend have a all in one suite than a simple defrag tool (If you want to buy this type of programs).

http://registry-repair-software-review.toptenreviews.com/how-to-improve-system-performance.html