Being a very frequent visitor to Aruba (our family owns a timeshare and house there), if I had to choose between them I would choose the Jeep tour. Locals frown heavily on the ATV/UTV tours, as it damages the ecosystem, and as fun as they can be…..and very dusty…..I would never do it. Actually, there are talks that the UTV/ATVs will be banned, which could happen in the near future. Instead of either of these, I would highly recommend Trikes Aruba. They drive on the road and don’t do damage. You can drive them on your own if you want, but you don’t have to. Very fun time. We loved it! Have a blast while there!