A hobo bag is a fashion piece. It can fit a lot of stuff so you can transport things like your keys, cellphone and makeup. It is not a bag that is good with organization. It is more of a toss things in kind of bag.
A satchel is a versatile bag. You can use a small satchel for an evening bag. A satchel fits more than a clutch, but it is not a full sized bag. You can fit your phone, keys and makeup in a satchel. It isn’t as organized as a clutch, but it is not as big as a hobo.