How to decide: a verdict for each situation
The following verdicts assume a corporate apparel order for a fixed event or a fixed internal audience, priced in AMD and delivered into Armenia. Where the answer depends on a fact the buyer holds and we do not, that fact is named.
Choose DTG when the run is below about 100 units. At 25 units a three-colour screen print costs close to a full-colour DTG print and gives a worse result on the artwork. At 50 units the DTG position is decisive. Below that, setup dominates both methods and the difference is small enough that lead time and quality should decide it rather than price.
Choose screen printing when the design is one to three flat spot colours and the run is above roughly 120 units. This is the standard case for a company logo on a staff tee or a volunteer shirt. At 500 units the screen-print decoration cost is roughly half the DTG cost, and at 2 000 units it is less than half. Add the reusable screen argument if the same design is reordered annually.
Choose DTG when the artwork contains a photograph, a gradient or continuous tone. No volume makes a halftone screen print of a photograph better than a DTG print of the same photograph. Where the design is photographic at any quantity, the screen-print cost is not a discount; it is an approximation with a visible dot structure.
Choose screen printing when a specific Pantone reference is contractually required. A named spot colour that must match a brand standard cannot be hit reliably by a four-process-ink device. This applies to regulated industries, co-branded events and any run produced under a strict brand book. If the colour mandate applies but the artwork is photographic, screen print the brand mark and DTG the image.
Choose screen printing when the garment is polyester, a poly-rich blend or a technical fabric, or when it is washed hard and often. Pigment ink integrates into cotton and sits awkwardly on synthetics. Unless the blend is close to a 50/50 and the order is short, plastisol on a synthetic surface is the more predictable and more durable result. Industrial laundering on hot cycles likewise favours a cured plastisol film.
Choose DTG when the print area is large or the design is full-bleed. A 40 by 50 centimetre graphic across the front and back is mechanically awkward and photographically impossible in spot colour.
Split the order when the design has both a flat logo and an image. Screen print the logo, DTG the photographic panel. This usually lands below the cost of either method applied to the whole design.
Neither method is the right answer if the brief is embroidery or sublimation. Embroidered marks survive a hundred washes and read as premium at close range but cannot reproduce a gradient; dye sublimation is the correct process for polyester at volume. If the requirement is a hundred-plus wash life, compare those methods instead.