3ware vs. MegaRAID

Hello,

I am waiting for an ordered machine dedicated to PostgresSQL. It was 
expected to have 3ware 9650SE 16 port controller. However, the vendor 
wants to replace this controller with MegaRAID SAS 84016E, because, as 
they say, they have it on stock, while 3ware would be available in a few 
weeks.

Is this a good replace, generally?
Will it run on FreeBSD, specifically?

Thanks
Irek.