There are some factual errors there. I only know the Kinesis Advantage, but contrary to what the table on that website says, it is available with MX Brown and MX Red switches and it does have an integrated 2x USB hub.

Also, describing its portability as 'poor' while describing the portability of the fully split Kinesis Freestyle as 'good' is a little odd - I don't see how having to deal with two keyboard halves and more cables can be considered better in this regard. For me, the portability of the Kinesis Advantage is just fine.