I don't think employers are bothered how you get the IR but they will look at how many Multi hours you have. You can't really log the sim time so the I don't think the type of sim matters.
The other issue is will you do the IR with only 15 hours on the plane. The sim is great for procedures and provides a vital part of the course but the plane in the real world with turbulence, unpredictable winds random air traffic etc.. is another level.
I think the more hours in a real plane is better for you in terms of logged hours and chances of passing the IR first time.
Either way good luck.