Pineapple and pineapple are the same plant.

The pineapple (scientific name: Ananas comosus? (Linn.) Merr.), commonly known as pineapple, is one of the famous tropical fruits. The plant has a short stem, many leaves, rosette arrangement, sword-shaped, apical acuminate, entire or sharply toothed, ventral green, dorsal pinkish-green, often maroon margins and tips, born at the top of the inflorescence of the leaves become smaller, often red. Inflorescences are drawn from the leaf clusters and are shaped like pine balls.

Bromeliad (pineapple)

Short stems, many leaves, rosette arrangement, sword-shaped, 40-90 cm long, 4-7 cm wide, acuminate at the tip, entire or sharply toothed, ventral green, abaxial flourish-green, margins and tips often maroon, leaves at the top of the inflorescences becoming smaller, often reddish. Polygamous fruit fleshy, more than 15 cm long. Flowering period summer to winter.

Inflorescences arising from leafy clusters, pine-ball-like, 6-8 cm long, enlarged when fruiting; bracts green at base, reddish in upper half, triangular-ovate; sepals broadly ovate, fleshy, reddish at tip, ca. 1 cm long; petals long elliptic, apical at tip, ca. 2 cm long, purplish-red in upper part, white in lower part.

Reference for the above:Baidu Encyclopedia - Bromeliads