Depending on your specific suspension design the weight should be very central, through the BB. Evenly distributed between the wheels. I noticed the extra weight (not really a bad thing, just when lifting the bike), but didn’t notice the back specifically being heavier.
Unless what you're feeling is the rear end being more "glued to the ground" and less "poppy". Thats the nature of a coil. Although with the right weight spring you can still get a fair amount of pop.
@Cpembo6 Yeah I think that’s what I’m feeling, my back end feeling more glued to the floor and everytime I jump the bike the other has a different feel to it , not really in a bad way I was just wondering if this is one of those things that I’m eventually going to get used to