Typical Bug management tool comparisons

I have experienced several units, how to manage the bug before and after the use of Excel, self-made simple tools, Bugzilla, TD, Hua Chong BMS, and then reference analysis ClearQuest, micro-invasive BMS, analysis and comparison are as follows:<?xml:namespace prefix = o ns = "Urn:schemas-microsoft-com:office:office"/>

Functional Features/Products	TestDirector	Clearquest	Minimally Invasive BMS	Bugzilla	Hua Chong BMS
Architecture mode	b/S	c/s,b/s	b/S	b/S	b/S
User friendliness	Good	So so	Good	Poor	Good
Process customization	Y	Y	N	Y	Y
Query function customization	Y	Y	Y	Y	Y
Functional Domain Customization	Y	Y	Y	Y	Y
Attachment support	Y	Y	Y	Y	Y
User Rights Hierarchy Management	Y	Y	Y	Y	Y
Email notification	Y	Y	Y	Y	Y
Batch Modification	N	N	N	Y	Y
Export to external document	Word Document	N	N	N	Excel,html
Report customization	Y	Strong, integrated Crystal Report