For the future simple, the action is considered as a whole. "On June 15, I will drive 1000 km to Montréal." For the future continous, the action is considered in progress. "What will you be doing June 15 at 2 p.m.? I will be driving to Montréal." Native speakers sometimes choose the future continous to emphasize the action in progress. "Please come to our party on June 15. Sorry, but I can't come to the party because I will be driving to Montréal." More information here: https://www.ef.com/ca/english-resources/english-grammar/future/ https://www.ef.com/ca/english-resources/english-grammar/simple-future-tense/ https://www.ef.com/ca/english-resources/english-grammar/future-continuous/

Chris' answer is great. I just want to throw in something for you to think about concerning the future simple tense. I think your grammar examples, from your book (?) are bad. Too many books teach "will" as a future tense, when in fact the use of "will" is more complex and subtle than that.(As a teacher of English to foreigners, this makes me crazy) "will" is used most often when we are making a promise to oneself or to others in the future, or another way to say "be willing to (that is, be prepared to do something) " do something in the future.https://www.ldoceonline.com/dictionary/willing For example, in January, many people make resolutions to change in the new year: I will lose 10 kilos. I will read more books. (S0, promises to oneself to do something in the future) Promise to others: A is your mother/B is you. You are leaving your mother's house and going home. A: Don't forget to call me when you get home. B. I won't (= I promise you that I will not forget, and that I will call you). Willingness to do something (in the future): A. I'm having a test next week. Will you help me study? = are you willing to help me? (do you want to do this and/or have the time and desire to do it) If you look at the word "will" in the dictionary, you will see other examples of when it is used as a straight "I'm talking about the future here" https://www.ldoceonline.com/dictionary/will