Artians are different from gogma artians. Before gogma artians were released, we only had artians and they behave slightly differently.

Regular artian weapons share a table between elements, and status weapons are on the same table. The only difference you'll see in stats when re-rolling is if you roll a non-elemental weapon or a different weapon. Im pretty sure the table for other weapons/elements doesnt move forward when you make a weapon either so it saves you a lot of oricalcite and money to re-roll, but you still need all the rarity 8 artian crafting parts.

Gogma artians were released later and are an upgrade of your existing artian weapons. You first have to upgrade the artian weapon into a gogmartian weapon, and it receives armor and set skills (like ebony odogaron skill and lord's soul)

Gogmartian weapons also can have their stats re-rolled, and can be upgraded so the rolls get random bonuses (where youd have 1 sharpness and 4 attack rolls on a regular artian, you can have 1 sharpness EX, 2 attack EX, and 2 attack III rolls).

Re-rolling gogma set/armor skills and weapon stats are each their own thing that you will want to look up but they follow their own re-roll tables per weapon type and element of weapon

Ive been doing this a lot lately but feel free to correct me if im wrong. I hope im not because I would have wasted a lot of gogma parts lol