LV price in paris is slightly cheaper than italy and VAT rebate is 12% same as italy. Gucci price is same in europe.
They will give u 12% tax refund, but when u go out from the airport, the tax refund counter will charge some admin fee from you. You can choose cash or cc rebate, as long as u let them do the documents for u, they will charge u. You also can post the tax refund doc by yourself, then you will get the full 12% rebate, but u must do it before you get on your plane.
I bought a pair of birken stock and I got back 4 euro tax refund, the tax refund counter told me to post the doc myself as if they do the doc for me, they will charge me 3 euro and end up i will only get back 1 euro. lol..
And remember if u buying things in Switzerland such as watch and if u are taking a train which cross border to another country, pray hard for the custom officer come on the train and u can pass your tax refund doc to the officer, if not u will get back nothing from the tax refund. Coz swiss is not considered a EU country unless you buy things there and get out from swiss airport. Their tax rebate is 7% if im not wrong.