LS Otakis vs. Katakis?

I had climbed in Otakis for the last year or so and LOVE them.  I have had them resoled a few times and the leather on top is now stretched and I have to crank down on the velcro which is causing some pain, or else they feel too loose.  I was looking to buy new shoes to replace them and was considering the Kataki - I have TC Pros and had Taratulaces, and think lace-ups for my more aggressive shoes might be a good idea.  I have read other posts which seem to suggest that I should maybe get the Katakis in the same size as my Otakis (44).  However, this website says the Katakis are NOT just lace-up Otakis and size quite differently.  Furthermore, this website predicts I should get a 44.5 in Katakis.  
First question - are Otakis and Katakis really that similar, or are they truly different shoes?
Second question - if I get Katakis, what size?
THANKS!!!

Ryan:
Are there ANY differences you can discern?  If I try on Otakis at REI what should I expect from Katacki’s

The Otakis are definitely a bit higher volume.  So, if you have wider feet, it might be worth getting the Katakis in a bigger size.  However, the Katakis seem to be a bit less downturned to me, so I think that kind of cancels out some of the difference in the volume.