I'm definately more lazy and relaxed about certain things. Extended BF, cloth diapering, no tv, (generally) healthy food is still there, but the house is SO much messier! I mean ridiculously more messy. And when I had only 1, I did have this little spot of judgement for the messier houses of my friends with more (this nasty little internal voice saying, "well if they just cleaned WITH their kids the way DS1 cleans with me...") Shame on me.
Now I've got two high needs, spirited, high energy, mama-attached boys - there are days (weeks!) when I take any spare moment I can to take care of myself (read, call a friend, sleep, take a shower), rather than take care of anything around the house. DS2 likes to do laundry and wash dishes, the floor, etc. But most of all he likes to follow me around as I put things away & take them out again. And he HATES the vaccuum. So I don't.

I also think there are ways that simply having an older child in the house creates a different experience for DS2 than DS1 had at this age. DS1 didn't tast chocolate until he was 2 (thanks to his aunties!), but DS1 has had a taste at 21 months because DS1 had some. There are a few other examples - like 'karate' moves - that I felt strongly about protecting DS1 from as a toddler that he now introduces his little brother too. I'm still figuring all that out - how to 'protect' DS2s toddlerhood, while still respecting DS1's need to explore more mature themes.