Oberyn, an already lean man, showed up dressed in light equipment because he was expecting to fight an 8ft tall, 420lb man, who was wearing an extra 200lbs of equipment. He had it planned out from the beginning that he couldn't afford to get close to Gregor.
Brandon, a tall man, showed up dressed in full knightly armour, while expecting to fight a less than 5ft tall scrawny 14 year old boy wearing armour. He had known from the beginning that he would be the much bigger, taller man and came in fully prepared for combat anyways, and only decided to drop his armour when he saw that his little tiny boy opponent couldn't even afford any.
Really it's the completely opposite. Brandon was the Mountain, and LF was Oberyn. LF just didn't have any of Oberyn's skill while Brandon had both the size and skill.
So like the Viper vs the Mountain?
"I can see it. You have more of the north in you than your brothers."
In any case all of this "I'm making things up as I'm going" writing fits for me with how Sansa has a complete personality transplant between Book 1 and 2 that most Sansa fans handwave away.
I tend to skim through Sansa's chapters as I feel she hasn't changed at all all series (and that's not a compliment), so mind telling me what the change is?
I've commented on it in the past, but it's a pschizofrenic shift IMO. She goes from being self-absorbed to the max to all of a sudden considering other people's suffering. True, she lost her father in between there, so there's a reason, but it's a slap in the face if you read the chapters at the end of AGOT back to back with the beginning of ACOK. She goes from being annoyed by poor Jeyne Poole 's crying and asking if Jeyne could see her father so she can stop crying, clueless to the fact Jeyne's father had died, to all of a sudden having pity for Ser Dontos when she couldn't muster up the least amount for her supposed best friend.
It's a complete shift in the character, that has a fig leaf to hide behind, but suddenly in ACOK Sansa has more empathy for strangers than she did for poor Jeyne. Yes, Sands lost her father in between then but the outward focus of Sands after her being a decidedly inward focused character really feels like it comes out of left field.
It makes sense, considering Sansa likely deviated from the role GRRM intended for her originally, but at the same time, it really feels like Sands was "recast" in ACOK.