There is no real difference for the people on the ground in Lisbon.
You give up your life in whatever country and move over without seeing a contract. Maybe 4-6 weeks later you finally see your contract, what are you going to do if it sucks? You have sold your house etc, you are pretty much comitted. So you stick with it while recieving ZERO training (this is begining to change in some departments) only to find out all is not straight forward.
You first contract is valid for 7 months and they can let you go at any point until 15 day before the renewal date. Not sure how that works when you receive no training, have vague Terms of Reference, there are no SOPs to follow and no formal performance interview proccess. After you first 7 months you then sign another temporary 7 month contract (no one tells you this, you have to ask the right people) where the same rules apply.
So for 14 months you are in limbo and it would be unwise to fully commit to life in Portugal until you have your permannet contract. This is no way to treat employees. Hopefully this will improve with the new head of HR and the CEOs efforts to improve things.