Of course not, you just need to check the earlier rumors, before it was announced. The 30.4 megapixel one was rumored to be the higher-end model of the two, so there can be a pretty good idea about what the lower-end model is going to be like...
Rumors are rumors, but I don't remember any rumor that suggested that the first FF mirrorless would be a higher end model, and there have been many arguments advanced that the R will be followed by a higher end model in the next year or so.
See the original post of this thread "So expect this to be a higher-end EOS R mirrorless camera. *update – I didn’t want to mention it (but it has been on the forum), but we don’t think an EOS R launching with the EOS 6D Mark II sensor and no 4K would be received all that well."
Beyond rumors of pixel count, there are plenty of other pointers suggesting that the R is a lower-end initial foray, among them being the introductory price, 6D features such as the single card slot, relatively modest frame rates etc. But the strongest suggestion of all is that two absolutely top of the range lenses have been introduced with the R, and strong rumors are that f2.8 zooms are coming. These are obviously destined to be mounted on a larger, faster, more "pro" body.