Just pick one...Trevi PM or Tivoli PM

Def Trevi PM. I have it and loving it! It has the shoulders strap that Tivoli doesn't, which can be very useful at times. Good luck and have fun deciding!
 
Trevi pm. I've had mine for a year and a half and it still looks brand new. It is very versatile. You can use the double handles on the shoulder and it has the long strap. Just looked at the tivoli pm last week with my daughter. It's pretty but very tiny. She could get the straps on her shoulder but she's very small. I don't think many people could use it that way. And no worries with the trevi vs the vachetta.