beta has t5 npcs spawns that are good to farm. alpha has only t4 spawn. of cource its highly more risky to fatm them on a pvp island. i dont know if anybody does. i havent been on betas a lot latlely. if then for a bit of pvp or mostly just on my way through on the way to or from gamma.
that spawns are way better. thats a plus for bets. gamma spawns (roamings) are not worth your time. oberserver is the only thing worth hunting on gamma. even industrials are now better farmed at beta.
sap loot was already mentioned and is a huge factor now. but with hopefully rining population in the future this will be a very tiny fraction. sap loot will be not realy worth mentioning if a few thousand players are in the game.
artifacts are better on gamma (way better) but i realy havent artifacted a lot in the last year. spand my first 2 months in the game with that as primary occupation. still on beta then. but i still profit from the mk2 cts i had found back then.
bezzer missions for beta would be a good thing in the new mission system. but then laso is needed for the beta2 islands and not just for the beta1 as its right now.
gamma on the other hand could use some pve content as well. something similar to the eve scanning stuff, or something else if someone has better ideas.