If you like the SSL-6, the Custom Stack Plus is the same/similar noiseless. The Vintage Hot is a little lower output but it sounds like a nice fat lightly overwound vintage pickup.
The Hot Stack Plus has the most low end and lowest resonant peak. The Vintage Hot is not as hot as the Custom, but its a different wire gauge so the tonal balance is shifted. Being more overwound vintage it has a little more low end girth. The Custom is hotter but also screams a little more.