ER+ER 280 OR ER+fusion 250/260?

https://preview.redd.it/fq5oej7ndcke1.png?width=2580&format=png&auto=webp&s=12d25cc14b9ecc156bb7d30b000f92cc819ab8a1

https://preview.redd.it/pexh427ndcke1.png?width=2580&format=png&auto=webp&s=af3c07d3ce361546b53643e6b6c3d15479b32506

is 2-ER 3 cost echo better which will give you over 280 or a 250 with a fusion will be better?

lastly this is my current echo I wonder which one is better when I try to add the brant passive they have a difference of 106 attack but the lower one have 10% more basic attack damage haha

Which is better thank you guys in advance