Taking this a step further, "dewpoint temperature" and "bubble point temperature" are terms we use to describe a mixture of refrigerants which have different saturation temperatures (zeotropic mixture).

Let's say we have two refrigerants.

The saturation temperature for refrigerant "A" at 0 psi is 10C/50F.

The saturation temperature for refrigerant "B" at 0 psi is 15C/59F.

If we mix these two together and are in the process of adding heat (at 0 psi), the mixture will start to bubble at 10C/50F and will finish evaporating at 15C/59F.

If we are in the process of removing heat from the mixture (at 0 psi), it will start to form dew at 15C/59F and finish condensing at 10C/50F.

The bubble point for this mixture at 0 psi is 10C/50F.

The dewpoint for this mixture at 0 psi is 15C/59F.

The difference between bubble point temperature and dewpoint temperature is called the "glide" which in this case is 5K/9F.

Note that evaporating finishes at the dewpoint temperature, so when looking at the low side pressure, we want to know the dewpoint.

Note also that condensing finishes at the bubble point temperature, so when looking at the high side pressure, we want to know the bubble point.