First off, be careful, some of the traditionalists around here will cringe at the contradiction in terms
Traditionally, a "sloop" has a single mast fairly far forward in the sail plan. It may have a one or two stays before the mast. A cutter has a single mast about halfway back in the sail plan. It usually has two stays before the mast.
Nowadays, there's lots of ways that a boat with two stays before the mast could have them arranged. There's always one from some point on the mast to the stem, and technically this is the "forestay" regardless of any other arrangements. There could also be one to the end of a bowsprit, from the top of the mast, called a "headstay" or "jibstay", a "jib" being any sail flown forward
of the forestay. The sail flown on the forestay is, of course, the forestaysail.
However, instead of flying jibs on a bowsprit, you could fly them from an inner forestay. Such a stay would attach down a bit from the mast and proportionally back a bit from the stem. But not two far down or two far back; then what you've got is not an inner forestay, but a baby stay, which is just for controlling mast bend and not for rigging sails.
Sometimes you see boats with two stays very close together. I think that in these cases the forward one is not really a stay but is just a furling system for a lightweight asymmetrical spinnaker or genoa that will be gybed on the outside. I've heard this called a Solent rig but I think that might not be quite accurate.
A modern sloop or cutter can have basically any combination of these things. If it's designed to fly one sail forward of the mast at a time, folks will call it a sloop; if two, then cutter.
Everything else, name-of-rigging-wise, is the same on the two types of boat, and the internet is awash with diagrams of the sort you're looking for.