In a vacuum, no retcons or future episodes taken into consideration that may lessen the emotional impact, this is comparing the episodes as they first aired.
In this corner, The Luck of the Fryish:
The story of Philip Fry, the Original Martian. But not the Fry we know and tolerate. The story revolves around Fry's relationship with his older brother Yancy, antagonistic and very competitive. Particularly over the ownership of a lucky 7-leaf clover. The scenes from the past show how hard the brothers fought each other over anything and everything, and the resentment and rivalry.
In the future, Fry learns that his brother is buried in a cemetery for heroes, and his tombstone declares that he is 'The Original Martian' -- the first human on Mars, which was Fry's childhood dream. Not only that, but apparently his jerk brother changed his own name to Philip. Resentful, Fry goes and grave-robs his brother, but discovers that the grave is actually that of his nephew (Yancy's son). Ultimately and despite all their rivalries, Yancy loved his brother and when he went missing, he named his first born son in Philip's honor, and gave him the lucky clover. It was his nephew that was the Original Martian.
In this corner, Jurassic Bark:
The story of Seymour, the dog who was Fry's loyal & beloved companion in the past. In the future, Fry finds the fossilized remains of Seymour. In flashbacks it's shown that Seymour followed Fry around everywhere with devotion and joy. When Fry disappears into the future, the loyal hound continues doing their routine alone. Others occasionally may look in on him (slipping him a slice of pizza here and there), but Seymour is lost and heartbroken, and ultimately the episode ends with him laying down to his final rest, in front of the pizza shop Fry worked at, his eyes slowly close while his best friend never returns for him.
In this corner, The Luck of the Fryish:
The story of Philip Fry, the Original Martian. But not the Fry we know and tolerate. The story revolves around Fry's relationship with his older brother Yancy, antagonistic and very competitive. Particularly over the ownership of a lucky 7-leaf clover. The scenes from the past show how hard the brothers fought each other over anything and everything, and the resentment and rivalry.
In the future, Fry learns that his brother is buried in a cemetery for heroes, and his tombstone declares that he is 'The Original Martian' -- the first human on Mars, which was Fry's childhood dream. Not only that, but apparently his jerk brother changed his own name to Philip. Resentful, Fry goes and grave-robs his brother, but discovers that the grave is actually that of his nephew (Yancy's son). Ultimately and despite all their rivalries, Yancy loved his brother and when he went missing, he named his first born son in Philip's honor, and gave him the lucky clover. It was his nephew that was the Original Martian.
In this corner, Jurassic Bark:
The story of Seymour, the dog who was Fry's loyal & beloved companion in the past. In the future, Fry finds the fossilized remains of Seymour. In flashbacks it's shown that Seymour followed Fry around everywhere with devotion and joy. When Fry disappears into the future, the loyal hound continues doing their routine alone. Others occasionally may look in on him (slipping him a slice of pizza here and there), but Seymour is lost and heartbroken, and ultimately the episode ends with him laying down to his final rest, in front of the pizza shop Fry worked at, his eyes slowly close while his best friend never returns for him.
