I dont see how 15 extra degress and optional chargeing are worth the extra 50$
Some folks (me included) want a home use vape that has a very clear readout, and a larger form factor..... just minus the plug.
This is like a non-plugin home vape.
Some portables like the solo are not so great for travel and stealth but are great for moving about the yard, or from room to room (or even in the tub!).
CF is for those that want to use the unit out and about in a stealthier fashion.
Medical patients also like more precise single degree increments, rather than the general "high/medium/low" type settings on some vapes.
I know of a number of very low income patients that tried both units, but they scraped up the extra $$ for the CFX, due to the way they perceived the unit's function.
I feel the extra funds are worth the difference.
If a person is in a tight spot, they should go with the lower cost item in most cases, but some folks medical needs (or desires), indicate a different choice.
Different Strokes~