Unleashed with R610 and R310...Can they run different firmware?

[mike_bruemmer_i]

I have a project with 4 R610's, 2 R310's and one T301.  As it turns out the T301 and R310's latest firmware is 200.7, yet the R610's can now go to 200.9.  Does it make sense to upgrade the R610's to 200.9 and leave the R310/T301 at 200.7?  Will this effect the unleashed performance if the WAPS are on different firmware?

Thanks,

Mike