This is call connecting in "parallel".
Connecting device to device is called "serial" or "series" connection.
Everything will work exactly the same. You would only run in to problems if you are also attempting to connect "other" firewire devices that are not FireStudios. I would not recommend this.
There are options in any case tho. You can experiment with which device works on what port and connected before or after another device, but the best way is to install 2 firewire cards. One card for FireStudios and another card for other devices like external hard drives, etc.