all three lead to him declaring "Now let's get to the intimate part".
And what are your choices at
that point? Unfortunately I don't have a save, I can't go check. I remember eventually being able to turn your face away when it seems like he might go in for a kiss.
No choice, you just accept the dance. At the end of it you kneel in front of each other and you get to:
1.
Press your lips against Wyll's.2.
Invite him closer with a knowing look - it's what you both want.3.
Turn your head away.4. This has gone too far. I should take my leave.
1. and 2. both result in a kiss and start of romance. 3. and 4. both have him walk away very slowly while thanking you for the dance with a sad puppy face.
Ironically, kissing him and then telling whoever else you were romancing that you choose them will make him a lot less sad (at least in the case of Shadowheart). He takes it like a boss.