I find a lot of these bike interesting in terms of pricing.
Whilst they clearly have differences in terms of suspension designs, a lot of the current crop of Shimano powered bikes seem to be out the same factory, and all very similar to the original un branded bike Shimano used to demo the system on originally.
The Commencal, Ghost, Merida, Vitus, Ridgeback, and others all seem to be out the same catalogue ( down and head tube designs all seem to be identical), so assume that the frames all cost about the same as the manufacturers appear to be just tweaking an off the shelf design, which means your really paying a premium for the brand or parts.
Some have more thought put in than others, i like the way the Merida has inboard brakes for example, but i would just go for the bike which has the best geo for you and the kit you want, at the best price.
That why i got the Vitus, my budget was not tight, but nothing i looked at really stacked up against it unless you where into 5k plus.