before CLAMP swore that you didn't have to read both mangas to fully understand everything...nows not that case is it?
if you remember back in ch 106 or 107 when syaoran appeared and asked to go "where the eye is" yuuko mentioned that "the price was already paid" but what we don't knowwhat it is, unless you read the cross over check point in TRC, ch 116 or 117, where yuuko said "the price has been paid. "the relationship" as well as "time" and "freedom"
the same goes if you only read TRC. when yuuko finally tells the gang about FWR, we see syaoran give a concerned look at watanuki's bandaged and bedridden form. why, tho, some who dont read it, would ask, would he care so much about watanuki? because in xxxholic, in ch 120, yuuko mentioned that Syaoran was the 3rd person who paid for his life, and paid the larger part of the bill.
speaking of the crossover where syaoran went too yuuko's shop. after he left, in TRC we immediately jump back to syaoran and fai in the dessert, whereas if you continue the crossover on the xxxholic, yuuko mentions how bonds are easily broken, but people can still live on. she's talking about Clone Syaoran's future betrayal, and how fai feels towards kuro betraying his wish to die. Sakura is heartbroken over the los of syaoran, yes, but she's determined to live on and find him to save him.
in xxxholic, yuuko mentiones that FWR is harvesting souls (via the wings demons) but we dont know that in TRC. some then could tie that to the reason as to why FWR killed Kurogane's mom: her soul is imensly powerful, being a high Miko. theres several other instances where you have to read BOTH mangas to get the whole picture!
at the point that both mangas are at, i think its imperative to read both mangas now. otherwise you might end up being clueless
