The quality issues and weirdo internal operating parts of the Champion are well-documented on this site. (Click toilet reviews above, and scroll down to the Champion.) The Vicki is a classic-looking toilet and the Champion is more modern looking, so I don't know what appearance requirements you have or whether you are just talking about flush quality. If you look around this site, you will see that you may wish to consider a comparable Toto toilet if low defect rates, excellent flush, quality design, reliability and easy repair are important to you. In the price range you are talking about, the Drake and Drake II offer two different designs that might appeal in the Toto line, along with any others. All these Totos flush well, without the need for one of those loud pressure-assist devices.
Keep looking here, because someone who contributes to this site will probably have some knowledge of the Barclay toilets.