The following is complete VMware vSphere 4.1 license comparison chart.

Click here to enlarge.

Please feel free to download from here.

Read FAQ show below as posted VMware Sales portal few days back.

FAQ
1. Are the promotions extending as well?
No the upgrade promotions are ending as planned on December 15, 2009

2. Why is VMware changing its position?
Customers have asked us to make this change in policy as they plan out their 2010 budgets and plan their vSphere implementations. They want these items to align with their Enterprise Plus upgrades. We want to provide maximum flexibility for every customer situation.

3. Is there a new date for Enterprise end of availability?
No, no specific date has been set. We expect Enterprise unit share to continue to decline as customers upgrade to Enterprise Plus and higher core processors enter the market. However, we want to provide maximum flexibility for every customer situation.

4. What happens to customers that bought Enterprise Plus because they believed Enterprise was going away?
VMware will not be implementing any kind of price protection program. Enterprise Plus provides exceptional additional value through the new features (vNetwork Distributed Switch, Host Profiles, 8-way vSMP, large memory configurations) and additional processor core entitlements. Ultimately, Enterprise Plus provides a significantly lower total cost per application than any other solution or option.

5. How does the 6-core restriction work for Enterprise?
The Enterprise core entitlement remains at 6-core and is technically enforced in the product. However, two Enterprise licenses can license one 8, 10, or 12 core processor

6. Will you introduce STD->ENT upgrade SKUs?
No, there are no plans at this time. Enterprise unit sales are already declining versus Enterprise Plus and this trend will only accelerate over Q4 and 2010. Enterprise Plus provides significant additional value at a lower cost per application.

7. Will VMware re-introduce the Enterprise Acceleration Kits?
No, there are no plans at this time. Our market research has shown that the vSphere Advanced Acceleration Kit provides a compelling set of integrated availability features for mid-size businesses at a lower initial price than vSphere Enterprise while vSphere Enterprise Plus provides the tools for minimizing total cost per application for larger deployments.

8. What kind of customer feedback did VMware receive?
Customers have asked us to make this change in policy as they plan out their 2010 budgets and plan their vSphere implementations. They want these items to align with their Enterprise Plus upgrades. We want to provide maximum flexibility for every customer situation.

9. Will Enterprise support more than 6 cores?
No, the Enterprise core entitlement remains at 6-core and is technically enforced in the product. However, two Enterprise licenses can license one 8, 10, or 12 core processor

10. Does this mean customers are not buying Enterprise Plus?
No, not at all. Customers are already buying and deploying Enterprise Plus as they upgrade from VI3 to vSphere 4. However, some customers have longer budget cycles and need to plan their upgrades far in advance. We want to provide maximum flexibility for every customer situation.

Hope this is clear and useful!