how does vbSEO compare with the SEO features built into vbulletin 4.x ?

I have a couple of vbulletin 3.x sites where I also use vbseo.

I have a spare vbulletin 3.8.x licence but I am considering upgrading to vbulletin 4.x (which costs almost as much as a new vbulletin 4.x licence!).

On my existing sites the only features of vbSEO that I use are SEO freindly urls and permalinks. I was under the impression that these were already included in vbulletin4.x.

So is there any point in me buying vbSEO for vbulletin4.x ?

Hello,
check out chart:
vBSEO - Feature Comparison vBSEO for vBulletin