Jon's only superhuman speed. The rating above is his reaction speed if you check the profile. Faramir's faster movement wise but Jon's faster reaction-wise so it kinda evens out.
That and Faramir has a lesser version of Aragorn's blessings, which includes telepathy if he focuses on reading Jon's mind + superhuman control over his movements and superhuman situational awareness.
Faramir's in a kinda weird spot skill-wise.
He's stated to be a warrior who no rider of Rohan can outmatch in battle. This includes Éomer who goes through the entire Battle of the Pelennor Fields without taking a single wound and who is shown to be capable of fighting multiple warriors at once at the Battle of Helms Deep (he was one of the defenders in the Book) and said Battle of Pelennor Fields. Albeit, he almost died to an ambush of two Uruks were it not for Gimli, albeit they had to trip him after pretending to be dead to get him in that position. Notably Éomer also seems to avoid any harm at Helms Deep too, minus this ambush.
Faramir's personal skill is left rather undocumented. We hear and see a lot about his superb leadership in the build up to the Battle of the Pelennor Fields, with Faramir leading a superb defense-in-depth strategy that surpasses Sauron's expectations. We also hear from Gondorians like Beregond that Faramir's own skill as a warrior was not short of Boromir, just "less reckless and eager" but "not less resolute". But his actual feats of personal skill is left largely unknown. Certainly skilled with bow and ambush, as seen in Ithilien and he was a capable knight as well, only nearly dying due to the Black Breath of the Nazgûl and an arrow/dart striking him during the middle of a duel with a Haradrian chieftain.
He probably isn't incomparable to Boromir and is arguably even equal or superior in skill, depending on interpretations, though on profile he's listed as just comparable for now but more on that below. Boromir being a warrior who could fight a host of over a hundred Uruk-hai and only lose due to being shot by "many arrows", rather than due to being overwhelmed in melee, and who was rated by Legolas as the strongest member of the Fellowship outside Aragorn (discounting Gandalf for clear reasons).
- For more exact numbers of how many Boromir can slay at once, we have a few. At Balin's Tomb in Moria, it's said he and Aragorn "slew many" while fighting the goblins with them retreating once 13 of them were slain. Later, however, they go through many more opponents and the actual numbers and how many were faced at once is unclear beyond "hundreds". Boromir notably comes out of Moria with no injuries described.
- Boromir dies at Emyn Muil, but he is said to have slain so many Uruks that they formed a pile around him and at his feat. Also, were it not for the arrows in him, it's described that it looked as if he was resting, meaning it's likely that despite facing over a hundred uruks alone, he took no injuries in melee, at least no notable ones (though his sword broke by the end).
He definitely surpasses a mere Gondorian man-at-arms like Beregond, who slew 3 of Denethor's guard, 2 of whom he slew while holding a door shut and while fighting multiple guards at once (there being multiple more of Denethor's servants still fighting Beregond).
Regarding how skill matches up.
Jon is probably superior to characters like Jaime who is implied to have, similar to Éomer, gone through multiple foes without a single scratch. Éomer being a character whom Faramir is directly stated to be at least equal to if not superior. Ofc, context matters and Jaime hadn't gone through multiple battles before in that context. He's probably comparable to Barristan as per Hakim, who is able to slay multiple opponents in a row. Faramir is again comparable here, but to a somewhat more iffy degree.
It depends on how favorably you compare him to Boromir, and when you look at the Book
This is what the actual appendix has to say, so it's probably safe to put them as equals.
So overall, you should be able to compare Jon and Faramir as both being comparable to warriors skilled enough to hew down many opponents at once or in a row.
So here's how I look at it. For Faramir:
- Faramir is roughly 3x stronger and has a LS advantage that is high enough that Jon's sword will go flying if they lock blades for more than a moment. Heck, a parry might disarm Jon at that difference.
- Faramir also has telepathy that lets him potentially read Jon's thoughts
- Faramir has enhanced senses that gives him superhuman awareness of his surroundings, making him very hard to catch off-guard
- Which is in conjunction with his superhuman control over his bodily actions
- Faster movement speed
- Comparable skill to warriors who can fight and slay multiple skilled opponents at once/in a row.
For Jon
- Jon's reaction speed is basically 2x faster than Faramir
- Jon has comparable skill to warriors who can fight and slay multiple skilled opponents at once/in a row.
Overall, this seems like a win for Faramir for me. The exact difficulty is pretty unclear to me, but it seems like he just has more advantages.
