Missing my point 
I know the difference is a miner with 1Gh/s will be solving 100 times less hashes. My question is, if they were to solve the same single hash together, would it be at the same speed. 
I know the difference is a miner with 1Gh/s will be solving 100 times less hashes. My question is, if they were to solve the same single hash together, would it be at the same speed. You already have the miners' speeds given, 1Gh/s and 100Gh/s, so I think you are asking about something else then speed.
If you are asking about the time it would take miner A and B to solve a single hash I think there are two possibilities:
1) Miner B will solve it 100 times quicker
2) Miner A and B will solve it in the same time, but miner B will be able to accept 99 more hashes during that time (parallel processing).
My guess is that it is a mix of both leaning more towards (2).