A larger ring gauge exposes more wrapper leaf relative to the filler inside it, which tends to bring wrapper-driven flavor forward more than a thinner vitola of the same blend does. A robusto and a lancero built from identical filler and binder can genuinely taste different for exactly this reason, not because anything about the blend itself changed.
This is worth knowing before assuming a disappointing cigar means a bad blend, or a great one means the reverse. Vitola choice shapes draw, burn time, and how the flavors layer, sometimes as much as the leaf selection does.
If you are trying a blend for the first time, it is worth asking what vitola it is known for before judging the blend itself off a size that happens to be in stock.