As I tally it, the only thing making the HCR lighter than the SnoPro, is the Boss seat. You don't get a Boss seat on a SnoPro unless you snow check it or you pay for it. Seat is stock on the HCR. If you put a Boss seat on a SnoPro, you are probably a couple pounds lighter than the HCR. Cost of a Boss seat without A/C special incentive offer is +$500.00.
HCR has zero pro gas shocks with titanium springs. SnoPro has foxs floats with no springs. Weight comparison is probably close. Cost of titanium springs approx +$500.00. Cost of regular springs on base model M8 is approx. $80.00. Don't know the cost of floats, but they are stock on the SnoPro.
So, to get a SnoPro, and put ti springs and gas shocks and a Boss seat you are looking at over $1000.00, but you can probably find an '09 SnoPro hold over in the spring with a Boss seat at a good price and then add the springs if you wanted for less than the HCR price.
Out of the box ready to ride turbo HCR sounds like your best option to me.