At my place I have the Lenovo Thinkpad Yoga 12 and the ThinkPad X230T. Overall, the Yoga 12 is a lighter and thinner system, but there is a lot more to consider. Let's see how the new system compares with the older one.
The Yoga 12's body uses brand new smoother materials, but it doesn't mean is stronger. The Yoga 12 is actually a plastic body.
The Yoga 12 is considerably thinner. On the new system we have lost the bulky VGA and even the DisplayPort, we only have one USB on the side, there is no more on/off antennas switch, and we have also lost the ExpressCard slot. With ExpressCard we can use a graphics card, sometimes called a ViDock or E-GPU.
New systems tend to have internal batteries. The old battery of the X230T had a secondary function as a very functional handle. So, if you are moving around (walking about with the device on) the Yoga 12 is not the most comfortable device to hold.
The right side of the two devices. The Yoga 12 has the power and volume buttons on the right side; the X230T has them above near the keyboard. The Yoga 12 has a mini HDMI, and it does not have an ethernet port. Both do have a port to hold the digitizer, card slots, and a lock. One more thing on this side, the X230T allowed easy access to the disk drive for upgrades.
The X230T had this weird additional bump for the radio antenna. New on the Yoga 12, a Windows button on the bezel. The X230T has three dedicated buttons for rotation, windows lock, and some menu (one which is programmable to do whatever you want; I used it to turn on/off multi-touch.)
The Yoga 12 has a more spacious palm rest and touchpad. Both have the wonderful TrackPoint and almost the same Precision keyboard. The Yoga 12 actually has smaller and thinner keys than the X230T.
Look! Both can do many of the same screen positions.
The Yoga 12 is perfectly flat on the table. The X230T has a slope that some people enjoyed, and others disliked.
Although the Yoga 12 is flat on the table, there is a hideous thing about the amount of space consumed by the hinge mechanism. As you can observe, the Yoga 12 has a bump, and therefore the screen assembly is not flat. Do note how the slimness of the Yoga 12 though.
From what we can see, the Yoga 12's thickness may fit within the the X230T's bottom assembly.
The Yoga 12 though is bigger on something when compared to the X230T, and that is the length of the device.
Not pictured were the bottom sides. The Yoga 12 has a single big panel--which means that any upgrades or fixes may require some extra work. The X230T RAM upgrade was very easy to accomplish.
Another feature that I didn't cover where the docking ports. The Yoga 12 has a port on the left side that is dedicated for the Lenovo ThinkPad ProDock. On the other hand, the X230T has a port on the bottom side, which is used in combination with the Ultrabase Series 3. If you need VGA or DisplayPort or DVI with the Yoga 12 (without the ProDock) then you will have to purchase an adapter. The ProDock does have full-sized Displayport and a DVI, and yes it also has an Ethernet port, and many more USB ports--so it could be a good investment.
Well, that's it for this post. The Yoga 12 retains a lot of the functionality of the previous systems, but it does remove several ports. I just hope that Lenovo never goes the Apple route with having a single port.