When comparing OpenSSH vs Remmina, the Slant community recommends OpenSSH for most people. In the question“What are the best SSH clients for UNIX-like systems?” OpenSSH is ranked 1st while Remmina is ranked 8th. The most important reason people chose OpenSSH is:
If you find samples or tutorials about SSH, they almost always refer to OpenSSH. It bascially defines what SSH is.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro The Reference SSH Client
If you find samples or tutorials about SSH, they almost always refer to OpenSSH. It bascially defines what SSH is.
Pro One of the most trustworthy development teams on the web
The development team of OpenSSH is part of the OpenBSD ecosystem. Their implementation is basically today's technical reference for any SSH client.
Pro Available on virtually any platform
MacOS. Windows. Core component on any Linux flavor.
Pro Standard implementation that documentation for all other tools assumes you have installed already
A lot of other tools (e.g. git) are based on this for file transfer.
Pro Straightforward user interface
It's easy and fast to find what you want, nice for daily use.
Pro Supports multiple remote desktop protocols
Remmina supports a number of protocols for accessing remote desktops - RDP, SSH, XDMCP, NX, and SPICE.
Pro You can manually adjust the quality of connection
To more effectively manage the available bandwidth, you can change the speed of your connection. This lets you sacrifice some of the quality of multimedia in favor of more speed.
Pro All connections are organized in groups
All connection profiles can be neatly organized into groups, making managing a large of machines simple.
Cons
Con No host list
Has no functions to manage huge numbers of hosts.
Con No way to organize SSH connections
No way to organize SSH connections.
Con Command line tool
It can be difficult to use from a command line interface.
Con No RDP server, only client
Remmina is only a remote client (VNC, RDP). It has no server features.