They are both worthwhile. For us, it's a matter of logistics. Accessing Pangani is easy, accessing Maharaja is a bigger challenge. Maybe it's because we always do the safari, but not Kali. One option is to see the trail that fits your timing. If it feels like a toss up logistics-wise, then see the tigers (assuming you'll return to AK).
SUPER IMPORTANT TO NOTE- BOTH trails close during thunderstorms!!! We are very much in Florida- thunderstorm potential season. ALL the animal exhibits, plus EE close during thunder. At AK, that = about half the park. At AK, there's always a chance you'll need to modify plans based on weather.
*****
If this is a once in lifetime kind of trip, then I suggest trying to squeeze in both. How long it takes to complete a trail is highly variable. Sometimes we meander and take our time watching the animals, other times, if we've only got a short time before a FP window- then we can complete a trail in a few minutes.