Dont forget that on the 7550 CHF you will get taxes to pay.
In switzerland they are deducted from your salary when you are not resident, it varies according to your yearly earning so first month it s almost nothing but after 2 or 3 month it rise to around 20%...
7500 -20% = 6000 chf (4176 euros)
And also if they obey the swiss laws you have also to pay for the social security...