In PvP Sol players are better ofc but PvM? i think Global EU players are way better in pvm then Sol atleast high lvl players...
but i have also seen a lot of players with M skills and normal equipments (nothing special).. also prices of books/soulstones are exactly the same.
I only noticed that sash, talisman, and high level pvp gears are a bit more expensive on Sol, but upp stuff like pearls, +9 clean items etc are way cheaper son Sol.
I believe that this merge will benefits both sides.