oracle

I have a question I was hoping I could get some information on. Here is the question.

We in the final stages of picking a new ERP package. The two finalist run on different databases. One runs on Oracle Standard version 8. The second runs on Progress Enterprise version 9 . I am trying to find any information on the differences between the two databases. Is there really any differences and what those differences might be. I also am trying to determine what the real differences between the various oracle products are. Do I need the Enterprise version or will standard work for us and what exactly are the differences between them. I do not want to get 6 months into the project and find out I need an upgrade. That would not go over well with the owners. The progress provider is saying you can not perform live backs with Oracle standard version. He is also saying I will need to upgrade to the Oracle Enterprise solution in the near future for E-Business and licensing cost will skyrocket. I find this hard to believe but I need to run it down. I am trying to determine over 5 years which each one would cost more. I am comparing licenses, maintenance, training and support costs. If anyone has any thoughts or has some good information I would greatly appreciate it.

Thanks

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Jim Busch
IS Manager
Richfield Industries