Tomcat 5 vs Websphere Express

We have just completed deploying our first JSP application. We are using the 
in-process tomcat app server and it has worked fine. We chose this over 
Websphere since we could just drop the JSP files in the IFS and they would run. 
With Websphere you have to package and EAR/WAR file and then install and deploy 
it on the server. Tomcat looked to be much easier. We want to take the next 
step and clean up some things we didn't do right due to lack of knowledge and 
needing to get the application in service. One thing we want to do is move the 
jdbc connect code and place it in a java app in order to hide the 
userid/password from the jsp and to reuse the connect code in the next project. 
In order to do that we need to go to JDK 1.4 and the in-process server only 
supports JDK 1.3. We just downloaded and installed Tomcat 5 but after taking an 
initial look at it, it looks a lot like Websphere. Now I'm not sure if we 
should forget Tomcat and go Websphere or stick with Tomcat. Got any advice ?
 
Thanks