Except OVH is a haven for nefarious use (seedboxes, etc.) and Hetzner most certainly is not!
Particularly through certain resellers, including the own "budget line" (http://www.kimsufi.co.uk/). Not that I'd know anything about nefariousness, 'onest guv.
If not it might just be that they like to quote nice round figures (£14.99 and €14.99 perhaps) - this happens sometimes when the pound and the euro are (or recently have been) near parity.
Not sure if it's still the case, but they also used to have a policy of blocking port 6667.