another thing I forgot to mention. The brown pads are probably a tad heavier. If your finding trouble getting FULL rotation, it may take a real serious snappping of the knees inward as you open at the hips when you drop into your fly. My heaton 6 6800's are much this way. With the deep channels and heavier pads I need to have good knee bend, stance width slightly more than shoulder width and a hard snap bringing the knees together. The nice part about the whole thing is on recovery. The pads will come back front pretty well as long as the straps for skate integration are not TOO tight. When skating, if you have a feel of being pulled to one side or another it could be a skate/heel strap a tad bit too tight.
If you have toe straps instead of laces you might want to consider purchasing a bridge and lace set up. If there are no toe caps(open toe like a floor hockey pad) and straps, maltesehockey sells a very inexpensive gel toe cap w/lace replacement that you get custom to your pads. I had these installed on my heatons after taking a shot to the cap that hurt like hell and then had my foot go numb from the impact. I also had the straps which got cut every time a puck struck the front of the blade. The knot set up for laces is pretty important. Pulling the lace/bridge tight to the skate blade can cause some problems. When going wide for your B-fly drop the pad can lift the blade free from the ice instead of cowling contact. Reduced angle of blade contact means less extention for lateral drives from a down position and a higher knee lift to regain edge. It can also seriously increase the risk of a slip out/groin injury.
The lace should allow the pad to slide over in its skate channel so that the cowling is what contacts the ice, lifting the blade free. The pics below will show the set up I have found to work best.
This is what you want the pad to do, slide over....
a square knot tied tight to the bridge and a simple knot about 1-1.5 inches out from there.
it is real important that the second simple knot is centered on the front of the skate blade and that the laces are crossed going through the first opening in the skate blade chassi. After that how far back you co criss crossing and then up around the skate is totally a personal preference. A standard skate lace works best for durability.
One problem many have is the toe lace knot coming undone. I suggest that the goalie place his skates on but do not tighten them. secure the toe lace from the pad to the skates and then take the ends and bows under the loose skate laces. Lay flat and then tighten the skates to the feet. This way they are held in place between the skate tongue and the skate laces. They do not come looose or otherwise drop down to get stepped on.