I don't know who in the Syrian army they are sending, I imagen not their best as Assad would want to keep those. But they do have experience in urban fighting, more then most Russian conscript. Not suggesting this is some tie-breaker but it is more warm bodies into the fray.
I don't mean the inhumanity of the armies themselves, in a war in many instances, in the end it comes down to guy a looking down a barrel making a decision to pull the trigger. this decision will be easier to a Syrian soldier then a Russian one for many reasons.