Linode's origin is as a VPS provider. OVH's is as a dedicated server provider. OVH's top server is twice the cost of Linode's and their cheapest is 5x the price (10 vs ~50).
Cheapest OVH dedi I see is the KS-1 for 3.99eur, which is less than the cheapest Linode VPS. OVH also doesn’t try to nickel-and-dime you by charging for data transfer.
I wouldn’t recommend the cheapest Kimsufi offerings though, something like the SYS-WS-1 goes for $33 and is easily comparable with Linode offerings priced at multiple times that.
OVH has a VPS product that’s far cheaper than what Linode offers, but I can’t speak to the quality of that offering.