During january and february 2019, a beautiful celestial phenomenon can be observed, even with modest binoculars. In this case, 7x or 8x magnifying binoculars will likely be better to fit both planets in the same field of view than those of 10x or higher.
A small scope is best to see the phase of relatively small Venus or the cloud bands of Jupiter.
Color and brightness differences are striking. I enjoyed my 8x30 views best so far, with separation of the planets closing from 6 to 4 degrees. When the planets near their closest separations of around 2.4 degrees, I expect my 10x56 to display the best views. Over the past weeks I've enjoyed many moments of observing these two planets in the same field of view.