R6300 vs Orbi RBK852 (upgrade?)

Ok...so I just installed a 8 Sonos speakers to go along with my 15 smart bulbs as well as other various wifi devices (laptops; desktop; etc.).  In my netgear genie it shows 31 wi-fi devices.  I also took advantage of a gigablast promotion from Cox communications.  In speedtests throughout the house I've gotten anywhere from a low of 71mbps to as high as 335 mbps.  Will I see any noticeable difference in upgrading to the Orbi 6 versus staying with the R6300 dual band I'm currently using?  I'm was expecting to see somewhere in the 600 mbps or better...also the house is 2 level 1800 square feet.  Your input is appreciated...thanks!