There is no definitive answer to this question as intelligence is difficult to measure and may vary depending on the individual animal. However, some research suggests that tigers may have certain cognitive advantages over lions. For example, one study found that tigers performed better than lions on a series of problem-solving tasks, such as retrieving food from a puzzle box. Tigers also have larger brains relative to their body size than lions, which is often associated with higher intelligence. Additionally, tigers are known for their solitary lifestyle and may have developed more independent problem-solving skills as a result. However, it is important to note that these are just general observations and that individual animals may vary in their intelligence levels.