Ceramic wars: boca vs acer

[captain harlock]

Hi fellas, I'm just about getting my tamiya TB EVO 4 MS and I want a good set of ceramic bearings and through my search in the web I found that bocabearing and acer racing ceramic bearings are amongst the best in the industry( I'm using two kits from acer racing one for the B4 and one for the T4) and now I'm thinking about the boca ceramics, but they are terribly expensive compared to acer reasonable prices. Boca sells their's for 199+ dollars while Acer sells their's for 99 dollars and I truly wonder if there is that much of difference between the two? may be Acer uses hybrid ceramic balls and Boca uses pure ceramic balls?!! Need some help. Thanks.