Well, this gets a bit complicated because 'Violet Evergarden' the light novel series technically has two potential 'endings' depending on how you define it, and it's all tangled up with the anime adaptation. The original novel by Kana Akatsuki concluded in two volumes, and it does give Violet a resolution. She's come to understand emotions and lives on, writing letters and connecting people.
But the anime, especially the 2020 movie, took a very different, more definitive and romantic closure for her story, which some fans love and others find a bit too neat. The novels feel more like a continuous, open-ended journey where her work as an Auto Memories Doll is her life now. So, yes, the ending atmosphere and specific fates of characters like Gilbert are different. I actually prefer the novel's quieter, more bittersweet tone—it feels less like a finale and more like a snapshot of a life that continues to grow.
You should absolutely check out the light novels if you liked the show. They're beautifully written and provide so much more internal monologue from Violet, which really changes how you see her early struggles. The ending isn't a dramatic climax, but a gentle settling, which in its own way is just as powerful.