H4 EAD - W2 or 1099?

[Guest]

Hello

Previously my spouse was on H1 and had an employer and used to be on their payroll on W2. Now she has H4 EAD. She got a new contract job through a vendor at a client place. Vendor is asking if she wants to be on their W2 or 1099. I am aware of W2.  I am trying to look online about the differences and it looks like 1099 has many restrictions. 

Questions:
1. Can she be on 1099?
2. Also, would there be a salary difference from vendor on W2 or 1099? Can we ask more for any of those?
3. Which is legally correct for of employment and which provides more advantage.

Thanks

[rahul412]

1.Yes, using EAD you can.

2.Yes, there will be since you will pay your taxes at the year end

3. Both are legal on EAD.