When comparing ZOC Terminal vs mRemoteNG, the Slant community recommends ZOC Terminal for most people. In the question“What are the best SSH clients for Windows?” ZOC Terminal is ranked 3rd while mRemoteNG is ranked 18th. The most important reason people chose ZOC Terminal is:
ZOC has a modern design.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Modern look
ZOC has a modern design.
Pro An actual "Terminal Emulator"
It's an actual terminal emulator (in the sense that it emulates a terminal) and not just a local console window app.
Pro Scriptable
Zoc provides complete automation of the client using its macro scripting.

Pro Flexibility in platform support
Originally developed for OS/2 (as Zap-O-Comm), Zoc is currently available for Windows and Macintosh.
Pro Can view and send to all sessions at once
Offers a thumbnail view of all session in thumbnails and type commands to all sessions at the same time.

Pro Supports serial and dial-up connections
In addition to telnet, ssh, and rlogin, ZOC supports direct serial connections, modem dialing, and named pipes.
Pro Tabbed sessions allows for easy navigation
Tabbed sessions mean that multiple items can be contained within a single window and can be easily navigated by the user.

Pro Hideable UI
Zoc allows for every UI component except the title bar to be hidden. All features are accessible through the context menu.
Pro Auto-Highlight feature
Feature to search for text bits in the data stream and highlight them with color/background.
Pro It's free
Open source.
Pro Import/Export feature
Allows to share connections.
Pro Can open multiple sessions in different tabs
Pro Connection manager
Lets you organize your connections into folders with icons as well and allows nested folders as well.
Pro Supports multiple protocols
RDP (Remote Desktop/Terminal Server)
VNC (Virtual Network Computing)
ICA (Citrix Independent Computing Architecture)
SSH (Secure Shell)
Telnet (TELecommunication NETwork)
HTTP/HTTPS (Hypertext Transfer Protocol)
rlogin
Raw Socket Connections
Pro Inheritance from folder properties
Inheritance makes it possible to store properties on folder basis and let the underlying connections inherit this info.
Cons
Con Hard to configure
It does not detect the installed shells (PowerShell, CMD, etc) automatically.
Con Options creep
It has so many options that it's hard to find the one you need.
Con Not free
Zoc requires a commercial license in order to use it, implying that it's not free.
Con Private keys needs to be managed on PuTTY
Since mRemoteNG is integrated with PuTTY (included in the installation), all private key needs to be configured on PuTTY itself and then the PuTTY session needs to be selected on mRemoteNG.
