Yes, Fear of Walking Dead will be just as popular as The Walking Dead. The Walking dead has enough of a fan following that it can support another show. Fear of Walking Dead is a spin off that is set in Los Angeles and depicts the world transforming into a horrifying apocalypse. This will be interesting to fans.
Yes, Fear of Walking Dead will be as successful as The Walking Dead. The Walking Dead is a very successful show, and there are many examples that show that spin-off programs are just as successful. For example, The Flash spun off The Arrow, an already very successful program. Both shows today do very well.
No, Fear of the Walking Dead will not be as popular as The Walking Dead. Spinoffs are seldom as poplular as the origin show that they spun off from. There are some examples, but keep in mind that these two AMC shows are not that disimilar. For a spinoff to make a name for itself, it has to do something new. Fear of the Walking Dead is not that much different from the original.
This is the second season of the spinoff, and while it has enough fans to be granted a second season, it is not nearly as groundbreaking as the orginal show was. It definately has appeal to fans of the genre and many fans of the show, but it is not as appealing to he general population.