New looks come with changes. If you are referring to the new Mihm Vogt Sintering ovens, they have some new features:
Some have increased capacity that comes with a changed configuration of the speed sintering dish and the platform.
Some have increased heat rate capabilties
Some are available with SiC or MoSi2 elements.
I have a pdf that will show the difference between the new and previous versions. Email me and I will send it to you.