They are comparable since both of them needs us to go to highest reward checkpoiints(level 7 in konoha tree and 500 draws in lucky *) to make the most of these events. Combining with the spending event of that time the value increases. If you see konoha tree always come together with the points event( the one where you get 1 point for spending 10 ingots or from plot/elite instances) and the redeem rewards will have some common ninja. Similar case with this week where lucky * is coming along with colourful balloon events, and guess what both have deidara also. Basic idea of event is to get 50 nine tail naruto and as much deidara frags from both events combined and with chances of edo asuma and masked man.Lucky * is an event focused on getting ninja frags and not much of powering up options involved here. If you are focusing on powering up you could very well go to lucky board, . From small amount of draws what i felt was you get low value for what you put compared to lucky board which is 10 times better.