Honzuki no Gekokujou: Shisho ni Naru Tame ni wa Shudan wo Erandeiraremasen 2nd Season

Essentially, both series present the same premise being reincarnated as a small child to a parallel world/universe wherein magic exists. The main protagonists in these shows specializes at reading books which develops their capability as the plot progresses. These are enjoyable to watch in general as it does not only contain comedic value but it can also teach something to those who are able to watch it. 

Almost identical setting, in which the MC reincarnates in a medieval fantasy world as a child, and uses his already developed intellect to his benefit. 

both MC have a week body, and both have magic aptitude which is only used by a few people in the world.  

Both anime have similar concept and setting .Much of episodes filled with main female protagonist adaptation with fine culture also their innovation and determination to others surround them. The only difference I noted is their patron. Shirayuki patron is a prince that loved her as a woman but Myne is just a child that have good ideas and intention patroned by a good "patriarch" who act as her teacher-guardian, so you will get more romance and shoujo vibes in Shirayuki than in Honzuki.