When comparing PuTTY vs Xfce4 terminal, the Slant community recommends PuTTY for most people. In the question“What are the best terminal emulators for Windows?” PuTTY is ranked 10th while Xfce4 terminal is ranked 20th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free
Pro De facto standard client for SSH, Telnet and Rlogin on Windows
PuTTY is one of the oldest and most popular clients. It has earned the trust of a great number of users over a long period by being reliable, offering useful features and helpful support. It got into the 15 Essential Open Source Tools for Windows Admins list by InfoWorld.
Pro Can be used on any Windows computer, even without admin rights
Pro Source code available
Full source available. Compile and modify it yourself.
Pro Lightweight and portable
Doesn't require much resources (memory and hard-disk). Can even be run on a system by just downloading without install.

Pro Good for systems with low specs
Like other applications included in the Xfce package, this terminal emulator is very lightweight and doesn't require many resources to run. This makes it perfect for systems that have low specs.
Pro True transparency
You can set the transparency of the Xfce4 terminal on any amount you want, out of the box.
Pro Tabs support
Xfce4 fully supports tabs and tab-based navigation.
Pro Almost everything is customizable
You can configure size, color, background, etc.
Pro Composition effects
Xfce4 terminal takes advantage of xfce composition effects.
Pro Fast rendering
Pro Can be switched to a drop-down terminal
You can configure the Xfce-terminal to act as a dropdown terminal if you want, which makes for greater ease of use.
Cons
Con Only one session per window
Cannot open a second session in the same window (you need multiple windows).
Con Can not save passwords
Anyway, you can use "PuTTYgen" to generate a key pair, then use "Pageant" to do a password-less SSH remote login.
Con Lacks features
It is JUST an SSH client. There are many other options with built in X-servers, Multitabbing, etc.
Con Ugly design, too simple
Looks very dated. Does the basic functions very well, but not much more.
Con No global settings
If you want to change a setting for all your connections, you'd have to do it individually.
Con Organizing sessions
Does not have features for organizing session connections (like folders). If you have 5-10 connections that's fine. But if there are 30-50 connections - that becomes a nightmare.
Con Tedious logging/tracing
Its tedious to set up logging and tracing (e.g. for serial connections).
Con No login scripting
Con Cannot set text color for character under cursor to background color
Suppose you have a dark background with a light cursor and light foreground color: the light cursor will cover up whatever character it is on, so that you cannot read it. There is no option to set the foreground color for the character under the cursor to what is normally the background color. Such an option would allow you to read the character under the cursor.
Con Execution in xfce4-terminal - e mode is not always functional
Con Resizing text resizes window
Con No profiles
There's no profiles or profile-based customization in Xfce-terminal.
Con Can't scroll on spamming text
When text generates too fast, you can't scroll it, so you just can't read anything in such moments.
Con Does not support sixel images
