First the Evo SLS is not lightweight, its just as heavy as kites from other manufacturers.
It is a bit lighter then the regular Evo but that was just an extremely heavy kite.
Secondly the newer materials are stiffer and although this results in a more reactive/direct kite I think this also might create more of a "being yanked around by the gusts" feeling.
So it depends on what you are looking for, the most comfortable or the most performant kite?
Most performance? Aluula/Aluula Hybrid or maybe SLS
Most comfort in gusty conditions? I know a Core XR is extremely comfy through gusts but there are probably similar kites.
To be honest the difference between 10-20 or 15-30 is huge (double the wind speed but 4x the amount of energy) and that’s always going to be an issue. I think getting a hydrofoil might be your best bet eventually, learning is going to suck but it’s probably the easiest way to handle such a large wind speed difference since you only need one power spike to get on the board.