My export don't look as colorful, as noisy than in the preview of Lightroom

[Colorful_Fireball8634]

Hello, I would like to export my image but the preview really doesn't match the export. I already had this issue when using Photoshop and his Camera Raw filter. So I switched to Lightroom but the exact same problem keep going. The preview doesn't match the preview of the export and the exported image itselft. 

I'm in sRGB by the way, on my display

[Colorful_Fireball8634 · Accepted solution]

I can't delete it but I found out that it was more about the fact that the preview was a dezoomed version of my picture and that the noise changed when you zoomed