Fleece is polyester and it has a pile. Those two facts decide everything about how it should be decorated.
Sublimation works here better than almost anywhere
Sublimation turns dye into a gas that bonds into polyester fibre. Because fleece is polyester, the colour ends up inside the fabric rather than sitting on it.
Nothing can crack, peel or wash off, and coverage can run edge to edge with no border. For photographic artwork or a full-bleed crest, there is no real competition.
Embroidery needs a backing and a topping
A cut-away backing underneath stops the stretchy knit distorting as the machine runs. A water-soluble topping on top holds the pile flat so stitches sit on the surface.
Leave either out and the letters fill in and the outline blurs. This is the single most common reason an embroidered blanket looks cheap.
Fine detail disappears into pile
The minimum legible detail on fleece is noticeably larger than on a woven shirt. Thin rules, small type and tight crosshatching all vanish into the nap.
The fix is to simplify at artwork stage, not to run it and hope. We will show you the difference on the mockup.
Where the mark should sit
A corner placement reads better than a centred logo when the blanket is folded on a shelf or draped over a chair, which is how it spends most of its life.
A full-bleed sublimated design is the exception — there, the whole blanket is the canvas and a corner mark would fight it.