hi, I'm currently trying to choose between the above two erf car seats. We can't afford a £300+ car seat so the joie allows us erf at a lower cost. I've read the which reviews and warnings that go with them and hope this car seats comes at a balance of providing good protection (esp motorway driving which I do once a month) and cost. But I don't know which one? why would I choose a Steadi when the Stages goes to 25kg and can be used longer? Is the Steadi a newer and safer model than Stages or does it have better options of comfort or seatbelt straps? Would be grateful for some insight on what seems to be a complicated and slightly emotive issue. Am happy to be educated!?