Linode's recent upgrades are awesome, but people are very quick to forget the period where they were being hacked left and right and didn't communicate with their customers until a defensive blog post weeks after the fact. No matter how good the servers may be, Linode should be a non-starter for anybody who cares about the security of their droplet; and, if you don't, why would you pay Linode's premium fee?
I'm told that's just the beginning of security faults in their platform, attributable to being a younger company and discovering these things for the first time; I have been personally shown evidence that DigitalOcean's platform initially trusted a hidden field called "userid" and allowed a user to operate on any other user without authorization, including restoring images, shutting down droplets, and so on. Their system at first had no protection against spoofed packets exiting a droplet, either, so ARP poisoning the gateway was (and possibly remains) a viable attack.
Linode is far more mature, obviously.
Every provider has security issues. It's how they rectify and move forward that should concern you. Watching DigitalOcean react to being informed that the issue they got burned on once had reappeared basically told me to never use their services.
Also, and I actually consider this very important and not a grammatical nit, Linode doesn't sell droplets. They sell virtual servers. You're asking for a Pepsi from Coca-Cola. You might consider this a minor nit, but it's actually a serious confusion issue that I already see happening.
Allow me to promise you -- not predict, promise -- that DigitalOcean will be compromised just as badly. It's going to happen. It's a matter of when and how they react.