The JP 8-10 has plenty of volume for your size , like the others that have already posted I'm in the 90+kg club and ride the JP 8-6 pro and the 8-2 pro but the 8-6 is my everyday board. The Starby 8-5 pro is a good comparison to the JP 8-6 pro and yes the Straby's are super light but they don't have a deck grip which helps keep the weight down and I find that pretty tough on your feet after an hour or so. Most Starby owners fit a kick pad or deck grip for more grip , that will add some weight back on , but in saying that the Starby 8-5 pro is a sweet board.
The main difference between the two is the Starby has it's widest point forward of centre.The JP is more at the mid point which lets you surf more from the centre of the board and not have to get back as much to turn. The JP fins are dead straight with no cant or toe which gives them really good drive and speed. The JP pro's have a more defined rail compared to the fuller rail of the Straby , a fuller rail is easier to paddle but a more pulled over rail lets you get over onto the the rail alot easier and generate more speed , but this can make the board feel more tippy when paddling as the board will sink a little more.
The Starby pros are full carbon and very strong , but the JP pro's are a mix of composites (no carbon) to still allow for torsional flex and it is a killer construction, super tough. They are very hard to ding or depress but you will get some paint chip on the orange so fit some rail tape and all good , no issues with the Starby chipping at all but they are really hard to to colour match if you ding it with the brush finish.
With the Starby being wider at the front it will feel more stable paddling . What ever feels best for you is what you should buy but I like a more pulled in nose on those steeper faces. Getting back to your question the JP 8-10 won't feel much different to what you had , so keep looking at the JP 8-6 pro & Starby 8-5 pro. They are both top end boards with a price tag to match so keep demoing them and ride them on Sh!tty days , if it all becomes too hard go back to the JP 8-10 pro , good luck with your choice and keep us posted.