No animal is more dangerous than a tiger
Answers
Explanation:
Both of these beasts are incredibly formidable and dangerous and are similar in many aspects. However if you compare their behavior or nature, a considerable difference can be observed. By dangerous, I suppose you mean danger projected towards humans.
Lions (wild) tend to be rather calm and collected, males don't usually bother much about anything and prefer to relax throughout most of the day unless there's opposition (other males) Hyenas or bull elephants nearby. They usually tolerate people. Take Dave Salmoni's experiment with wild lions as an example, where he closes in distance with a wild lion pride. Lons often fake charge people, as an intimidating gesture and usually ignore humans. There have been VERY FEW cases of maneating lions over the past few years.
But the Tiger is a whole different story.
Tigers are almost always the aggressors in human-tiger confrontations. Tigers have extreme prey drive, even more so than some other big cats and try to get their jaws around ANYTHING that moves and is within their capacity. Even when raised in captivity, this aggression and desire to seek and destroy things is instinctive. A little research about these majestic animals will tell you that Tigers, alongside homosapiens are among the few creatures that kill for sport. Take Soviet Russia's infamous stalking tiger incident for reference. Tigers are hyperaggressive carnivores, are highly opportunistic and are well established man eaters. They don't tolerate humans very well and are easily irritable. They hold the record for most number of humans ever killed by any animal. (Campavat tigress and several other notorious man eaters) Tigers are significantly more dangerous towards humans compared to lions. However, both can slaughter a mere homo sapien in a fraction of seconds.
But Tiger takes the cake here due to its superior agility, short tempered aggressive low tolerance attitude towards humans, somewhat of a preference of humans as prey and the ability to climb trees, and of course pure untamed ferocity.