well, for starters, they get a lot bigger.
this borneo girl topped out at 30 lbs. are you ready for that? I got this snake as a hatchling about one year after I started keeping snakes. we got off to a bad start due to my inexperience and lack of knowledge about snake psychology. this may not be a popular opinion, but I suggest you get more snake experience before getting into bloods/borneos. they can be very defensive as youngsters. their care is not dramatically different than BPs. I keep bloods in the same room as BPs and use only ambient heating/humidity. They are enthusiastic feeders and there are no worries about extended hunger strikes. as others have noted, they are very vocal.