Hello all. I'm about to get my first entry-level DSLR. Deciding between D5100 and 600D. Been doing a lot of reading about pros and cons between. And still can't totally decide based on the body.... However I have noticed the same bundled 18-55m lenses for both. The Canon one is significantly smaller. Does this ring true for basically all comparative lenses between Nikon and Canon. The Canon lenses are smaller (and I assume) weigh less. Majority cases? Or no consistent comparison. While performance quality and preference can always be debated. There is no debate on physics. So I hope someone can give me a definitive answer. Thankyou all for your time. (By the way, I'm at work and did a quick google and I didn't get any answers, just full review/comparisons between lens performance). Sorry if this is a known answer.