New Jungle Balance?

So in the current patch you can buy 2 jungle item. -One gives you** 20% slow** when cast on enemy champions for 2 sec. -Other gives 20% damage reduction for 4 sec plus bonus true damage with auto attacks over 3 sec

I dont understand this balance step. The second jg item is 2 times better than the first one. Why is that? Currently i feel i dont have choice and buy the red item every game. It looks much stronger by pure stats. Plus mechanics question. Does the "auto attack true damage bonus over time effect" stack? I guess no that would be op but i just want to be sure.