Are you a Re-muster? Or did you aquire your 64 frame from buddies or surplus? Your question is a valid one and brings up several key points.
Using non-issued kit is usually frowned on while on course. Main reason for that is uniformity and conformity. You are supposed to be part of a team, not an individual, therefore should have the same ruck as anyone else.
I myself possess a "Jump ruck", aquired many years ago. I recently just left a Para Position (3 RCR, Para Coy), I am now in a medical unit :-[ (I am a Sig Op Sgt). I am no longer entitled to use my jump ruck, as I am no longer in a para position.
My personal opinion on the ruck is that the 64 frame is far superior, configured as a Jump ruck. Just try and rig up the 82 frame with the bag on top with a manpack radio (AN/PRC-522 as you will soon learn), It just doesn't work.
My opinion on which ruck is superior is not pertinent though. The fact is that I use the "leg" ruck just like everyone else at my unit, as detailed in my unit SOP's and dress Regulations. Keep in mind, these are orders, not suggestions.
So, my advice to you soldier, is to pack/bring the kit list provided to you by the school, according to the kit you were issued. Don't attract unecessary attention to yourself by having non-issued kit, keep that kit for exercises at whichever unit you end up at. Some units are quite anal about what kit you can use some are not, the last Sergeant-Major we had in Para coy despised Black Polypro toques ...
At the end of the day, like I said, following rules, regs, kit lists and so on are what separates us from civilians. We may not like it or agree with it, but that is the foundation of a professional military.
Please let me know which way you decide to go. Good luck on course, and look me up when you get finished and up here to Petawawa, if this is where you end up.
R.C. Bradley
Sgt
Sig OP