You and your friend sound different.
If you are the left and right speaker, do you think your friend (center speaker) will blend well ?
If you are going for a smooth front wall of sound, make sure the 3 are the same.
Many do not care, so they say use whatever.......
I find 3 cheap same speakers worked better than non matching speakers.
But, to each their own.
Just my opinion.
Try what you have, it is free !!!!!!