Villagers with same professions have the same trades.

There are now more villager professions (only notable trade changes and additions listed)
White robe: Librarian (now buys stacked written books, can now offer different enchanted books)
Purple robe: Cleric (now only sells a single piece of redstone, sells lapis, buys ender pearls and rotten flesh)
Brown robe: Fisherman (buys string, coal, cooks normal fish, sells enchanted fishing rods), Farmer (no longer sells melons, buys melon blocks, pumpkins, potatoes, carrots, sells cake and pumpkin pie), Fletcher (buys string, sells bows, converts 10 gravel into 10 flint), Shepherd (sells colored wool)
White apron: Butcher, Leatherworker (buys leather, sells leather armor, enchanted leather armor, and saddles)
Black apron: Armorer (Sells enchanted diamond armor, iron armor, chain armor), Tool Smith (sells enchanted iron shovel/pick and enchanted diamond pick), Weapon Smith (sells enchanted iron sword, enchanted diamond sword, enchanted diamond axe, iron axe)

Given the more granular set of professions, the trades seem to overlap with the exception of enchanted items - librarians can still trade a large range of enchanted books for instance. But the fletcher only has a total of 4 items (according to the wiki anyway) so they will always look the same (other than perhaps price)

Thanks 🙂