[lsa]

I think you are asking a very hard question.
Both the Keiko and the Koral are good Gis.
at my place both Gis are very common, Keiko is the most common gi but thats because we can get it cheap. Koral is very expensive here.
I have never heard a bad word about the Keiko people love it.
It seems to be a very good quality too and keeps on going year after year.
My head instructor is a Brazilian with a BB and he only rolls in Koral.
But both Gis are very good. I think its down to your personal taste and money on this one.
I have a Koral but I have yet not rolled in it. Just tried it on.
It feels like a good gi and I already know I will love the pants.

I hope this can help you at least a little :-)