What each format actually does on a wall

A canvas print wraps the image around a stretcher frame. The surface has a slight texture and no glass in front of it. That means the image reads closer to a painted object, and it throws less glare under strong light. The tradeoff is that the edges are part of the display, and a canvas carries more weight than a poster in a frame. A framed poster keeps the image flat behind glass or acrylic. The surface stays sharp and the edges are defined by the moulding. It hangs lighter and usually costs less to produce. The downside is reflection. A south facing wall or a lamp placed wrong can flatten the image.

Rohrer worked in a loose, painterly manner, which tends to suit the softer surface of canvas. That is not a rule. A print with strong linear marks or a high contrast subject can read cleaner behind glass, because the flat surface protects the detail. If you are unsure, look at the original image first. A canvas will soften edges slightly. A framed poster will keep them hard. Neither is wrong. The question is whether you want the print to feel like a painting or like a printed object on the wall.

Where each format fits in a room

Canvas works best where you want the object to carry weight without a frame drawing the eye outward. A large canvas over a sofa or bed reads as a single object, and the wrapped edges let it sit close to the wall without a deep rebate. It is also the better choice in a room with direct light, because there is no glass to catch it. The caution is that a canvas above a certain size becomes a commitment. Once it passes roughly 30 inches on the short side, you are hanging a substantial object, and the wall has to hold it.

A framed poster is the more flexible option for a room that changes. It is lighter, easier to move, and usually cheaper to replace if the scale turns out wrong. It suits a corridor, a study, or a wall that already has a lot going on, because the frame gives the print a defined boundary. The weakness is glare and the visual weight of the moulding. A thick frame can make a small print feel enclosed. A thin frame can make a large print feel under-finished. Match the frame width to the image, not to the room.

Price, weight, and the practical tradeoffs

A framed poster is usually the lower cost option at the point of purchase, because the print itself is lighter and the framing is simpler. That makes it a sensible way to test a scale or a subject before committing. The hidden cost is that glass or acrylic adds reflection and a little weight, and a poor frame can date the object faster than the image itself. A canvas costs more to ship and to hang, because it is heavier and the corners need care. The upside is that it needs no glass and the surface ages as a painted object would, which is often what people want from a Rohrer image.

Weight matters more than people expect. A canvas over 24 inches on the short side is not something you want to reposition often. A framed poster in a modest moulding is easier to handle, but the glass still needs a secure fixings. If the wall is plaster or older, use the right hardware and do not rely on adhesive strips for anything substantial. The format you choose changes the logistics as much as the look. That is the part most comparisons leave out.