I would advise against engaging in any physical encounter with a healthy adult of either species. The chances of survival are extremely low. Whether you are considering fighting one of these cats mano-to-mano or simply trying to survive, the outcome is highly unfavorable for you.

A jaguar, in particular, possesses the ability to overpower you effortlessly. With its instinct to immobilize prey before delivering a fatal attack, it has developed immensely muscular forelimbs equipped with razor-sharp claws that can swiftly incapacitate you. Combined with its comparable weight to yours, exceptional balance, stealth, and superior speed, it is a formidable adversary that should not be underestimated.

I encourage you to watch a video of a tame jaguar play-fighting with a man. Even in a playful scenario, it becomes evident how challenging it is to restrain the strength and power of this majestic creature.

In conclusion, engaging in physical combat with either a lion or a jaguar is ill-advised and extremely dangerous. It is essential to respect the natural capabilities and predatory instincts of these animals for the sake of your own safety and their well-being.