Storage for 22 virtual machines

Hi

I am running Vmware Capacity planner about two weeks, Results got until now, are attached on, see below

What would be a better Storage between the following two:

IBM Storwize V3700:

Two controllers

Four Iscasi ports each controller

8GB cache each controller

12 Disks:  SAS Disks 600GB  or   900GB  10k 2.5 inch

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OR

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Dell™ EqualLogic™ PS4110

Two controllers

Twos Iscasi ports each controller

4GB cache each controller

12 Disks:  SAS Disks 600GB  or   900GB  10k 2.5 inch

Thanks