When comparing Virtual Box vs ZOC Terminal, the Slant community recommends Virtual Box for most people. In the question“What are the best Mac OSX apps for someone that's new to Apple?” Virtual Box is ranked 15th while ZOC Terminal is ranked 21st. The most important reason people chose Virtual Box is:
It works for Windows, macOS, Linux, BSD, and many others.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Compatible with Many Operating Systems
It works for Windows, macOS, Linux, BSD, and many others.
Pro Beginner friendly
A virtual machine can be set up in minutes if a ISO file to load is already available.
Pro Works well and fast for Windows host and Linux guest
Pro Free and open source
Pro Many free images available
Though most are linux flavors at https://virtualboxes.org/
Oracle's virtualbox site has others.
Pro Can do snapshots
Pro A lot of customization
VirtualBox has multiple virtualization options. Each one may be tailored to the guest operating system’s needs. This makes it especially good on virtualizing older systems, such as DOS, obscure distros, etc.
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.
Cons
Con Lacks video performance
Virtualbox has a hard cap of 256MB of video memory. This could make newer operating systems run slower.
Con Minimal CPU customization
You can only enable/disable certain features. You cannot cap the speed of the CPU, which is required to run systems such as Windows 95.
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.