I have never worn Jo Malone Vetyver, but it seems it is a fresh Vetiver scent. On Fragrantica, some users report that it reminds them of "L'Occitane en Provence Eau des 4 Voleurs".
I personally find that Guerlain Vetiver and Givenchy Vetyver are the absolute yardsticks that fresh Vetiver fragrances are measured by. They are both amazing.