What is your interpretation of a "Secure OS"? Trisquel isnt a hardened distro, so isnt going to give you any more security out of the box than a minimal ubuntu install - just a more restricted package selection.
What are your specific application requirements? OpenBSD is a BSD, not a linux, so you aren't going to have access to the benefits of the linux kernel - specifically hardware support.
You mention the device you are thinking of is a Razer Blade - which is chock full of hardware with closed BIOS and that will require 3rd party drivers. Its not exactly a libre device. The availability of some of that on linux may be limited, and may not exist in many cases on OpenBSD.
Maybe your question would be better posed by describing your requirements - what hardware and software you need/want/would like to use - then people may be able to advise based on that.
What are your specific application requirements? OpenBSD is a BSD, not a linux, so you aren't going to have access to the benefits of the linux kernel - specifically hardware support.
You mention the device you are thinking of is a Razer Blade - which is chock full of hardware with closed BIOS and that will require 3rd party drivers. Its not exactly a libre device. The availability of some of that on linux may be limited, and may not exist in many cases on OpenBSD.
Maybe your question would be better posed by describing your requirements - what hardware and software you need/want/would like to use - then people may be able to advise based on that.