SAN Switch DS-300B Brocade

Hi, I have the following situation and needs an advise from experts. The case as follows:

We are discussing with IBM people to purchase a new blade center, but when we consulted with one of the EMC partners we came to know that the switch model of the IBM blade is not compatible with the existing SAN switch DS-300B in our environment which connects the server to our storages VNX5300.

Now, IBM provided the following information:
http://www.brocade.com/products/all/switches/product-details/300-switch/index.page 
Equivalent model for EMC - DS-300B and for IBM SAN24B-4 , and the flex internal switch that we're quoting - (IBM FC5022 16Gb SAN Scalable Switch) .  
http://www.brocade.com/partnerships/oems/ibm/products.page
http://www.brocade.com/partnerships/oems/emc/products.page

Again when we consulted with the EMC partner, I was told that this switch model is not included in the EMC compatibility matrix...but i was told that this is also a Brocade.

I will attach the pdf file provided by IBM and I need somebody to advise me urgently.

Regards,

Fadi