Not into the first one. Your Venus opposite their Mercury and square both your Saturns, a fixed t-square. That's bound to turn into something extremely unpleasant for both of you. Also his Sun is at the apex of a yod with your Sun and Moon, so while this may be compelling at first (especially since your Venuses are trine) I get the vibe this would turn ugly after a while.
Your Venus in his 12th is not really something I'm thrilled with. Plus his Venus is in your 9th so I'm curious if this synastry even has longterm romantic legs. His Sun falls in your 10th and your Sun falls in his 11th only confirming this.
You don't put anything into his 5th, 7th, or 8th house.
He doesn't put anything into your 5th, 7th, or 8th house. Not counting the nodes here as that energy is a bit otherworldly and there are no planets to help modify the energy and bring it back down to earth.
His Moon is unaspected so he will grow dissatisfied after a while
The second one... also not something I like, really. But I would personally go for this one as I think there are a lot of fun sexual elements here.
The Pluto conjunct her Sun, he will have the "upperhand" according to classic astrology.
Plus her Sun/NN and Mercury fall into his 8th, so he will become obsessed with her on some level.
But she also doesn't put anything in his 5th or 7th (not really going to count Chiron here as a positive) so yeah, she's not "the one" necessarily. Plus her Moon is in his 12th so I don't think he'll ever really understand her. And her Moon is unaspected at that.
His Mars square her Sun, yeah, he's going to be extremely attractive to this Scorpio.
His Saturn conjunct her Venus, both of which sit on his South Node.. super duper karmic stuff here.
Because her Moon is unaspected so this is probably not really the relationship for her.