My router at the moment is an Archer C5 AC1200 dual band gigabit ver 4 which I just recieved from my ISP and this is connected to my ONT Fibre router.

To boost the signal in the house I am using an RE200 AC750 at the moment but want to look into getting a couple of the Deco M4's. What are the main differences/benefits between the two?

I plan on keeping my Archer C5 in use as the main router so would I just be able to set the Deco M4's up as boosters/range extenders by using the Access Point setting?

If they are going to be used just as boosters are they suitable or would other devices be recommended?

My current line speed is 100mbps.