the 05 head tube guesset is ever so slightly different shape and the head and seat tube angles are also a teeny weeny bit different on the 06 I believe, think the swing arm got tweaked with more 'dent's' for lateral stiffness too, no big changes though.
You must be tall…they are big frames and that must be 19"….and your using the bottle cage 😉
The frames are strong enough to take some big stuff but I did eventually manage to pop the air can on the shock….too many 8 foot drops I think. I stuck with an air shock though. TFT advise me that the older (pre RP3 etc) air cans were a teeny bit stronger…..although that's what mine was.
Oh BTW mangatank, I don't run the Alpine link (looks like snaps doesn't either) I reckon the extra inch on the fork has similar affects on the angles to using an alpine link, but obviously the BB is higher.