The ME2 save system shows you your level,class,and important decision such as
the status of the council or Wrex
,the path you chose,Renegade or Paragon.
ME2 doesn't really feel like ME1.Just as blubart said,they toned down ME2 to a level that it's hardly and RPG.ME1 was shooter-RPG,but this one is shooter with a trail of RPG.I think that Bioware could've done a slightly different version for PC,with all the necessary RPG incorporations.
About Rana
guess it or not,she finds trouble yet again on Illium.You have the same choices,but now killing her sounds really bad since she isn't doing much
.
One thing I loved about ME2 is
the Archangel.I only thought that might be Garrus when I saw his blue armor,but even then it was just a small hope.
Another thing I hate about ME2 is that one button gets you talking,running and covering.M
E2 was clearly made more as a shooter.I see EA's hand on this one,because DA:O didn't need to tone down the RPG part.
The new bullet system is a double edge sword;you do have to reload a lot,bullets fly out very fast,but there's a ton on the ground,so never have to worry about them.