you will not see much of either if kept correctly,fire sals are nocturnal, and tigers live underground, but out of the two id say fire salamanders, if tigers are given a deep substrate they will dig tunnels, and may not be seen weeks on end
only very young fire sals may be able to climb[although Ive never seen it], they are generaly too heavy an animal to be able to climb up glass. I have no lids on any of my fire sal tanks, although I do put a slight ledge around the inside to of the tank to stop crickets climbing out, this would stop any sal that managed to defy odds and climb