I personally do not much about the comparison of WebLogic and IBM WebSphere. Statements below is what I found at the ServerSide:
BEA takes the performance lead with new ECPerf results
In an HP sponsored ECperf posting, BEA Weblogic Server 7.0 beta has leaped ahead of IBM Websphere in both performance and price/performance metrics. Also in recent news, Borland withdrew their original ECperf result last week.
After seeing these results I called up Weblogic to get the scoop. Eric Stahl, Senior Product Marketing Manager, Weblogic Server answered a few questions:
Floyd: HP sponsored these results. What is HP's involvement in this benchmark?
Eric: Our platform independent and agnostic attitude towards the underlying hardware/OS/DB means we are going to publish as many results on as many platforms as possible to reflect real world deploy environments common in our customer base.
Floyd: Is this a
pattern you expect other vendors to follow?
Eric: One of our key value propositions is platform neutrality. Whereas IBM is trying to sell a single vendor solution, I don't think even they will only benchmark on IBM hardware and software.
Floyd: So how did you guys do so well over IBM?
Eric: It was purely a matter of getting our engineers focused on performance and getting many performance enhancements into Weblogic Server 7.0.
This will be the death nail for vendors who can't keep up on the performance side. Cause if you can't get the numbers in the game, I can't imagine a customer who would buy from you.
Ultimately, you look at performance numbers and price/performance numbers, and these are the metric that customers need to be evaluating when choosing a J2EE server.
These numbers show that it requires more hardware to get the same performance for a J2EE application running on Webpshere, than on Weblogic. IBM has a lower license/cpu cost than Weblogic, but the overall cost of running an app on Websphere will be higher than that of Weblogic, due to the need to buy more hardware.
Check out
http://ecperf.theserverside.com/.