Pregnant Before 35 VS After 35

I had my first when I was 31 and just had my second when I was 42. Pregnancy and labour I feel second one actually better and smoother but no doubt its more tiring physically. For me biggest difference is taking care of newborn, its so much more tiring now than 1st child especially with the sleepless nights and pumping. For my first I ebm for 1.5 years, for this baby I target 6 months and already finding it a struggle now as its really physically draining and to do it every 3-4 hours and restrictive for my job and life now as well.