Core is a Buzzz with no fade back. Very similar to old Elite X Buzzz with some wear on it. Maybe a Meteor is better comparison?
Fuse is very Comet-ish. TONS TONS TONS of glide. If you have good speed control you will love this disc. Low power players will get alot of straight distance with these.
DD Fugitive is a slightly more stable Core like disc. Closer to a Buzzz than Core.