Can you mix brands of 300b tubes

Hi- I just got a pair of Canary Audio M-350 amps which take 4- 300b an amp- they came with the   Genelex Gold Lion tubes but I have 4- EML 300b-xls tubes- do not want to spend the $$ on 4 more of these so was looking for some used ones- what tubes if possible would be a good match with the emission labs that I could keep an eye out for- thanks