Separate Sample/Audio drives on diff busses?

i am building a macmini system for a friend.



i am using two external drives, one for samples, one for audio.



is it ok to put both of those external drives into one (dual-bay) usb 3,0 enclosure and let them share one usb 3,0 port?



or should I put the sample drive into a single bay usb enclosure and let it use a usb 3.0 port and the audio drive into a single bay fw800 enclosure and let it use the fw800 port on the macmini?



my thinking behind option 2 is that the data will be spread across two separate busses..

Separate Sample/Audio drives on diff busses?