What's the point of pseudo-big.LITTLE CPU in Nokia 7 plus?
I think you are mistaking the "Kryo" brand from Qualcomm from being different than just a customized version of ARM big.LITTLE.

As stated in the Qualcomm Snapdragon 660/630 announcement article from Anandtech:


  Snapdragon 660’s Kryo 260 CPU uses four semi-custom Cortex-A73 cores in the “performance” cluster and four semi-custom Cortex-A53 cores in the “efficiency” cluster in a big.LITTLE arrangement. The Kryo 260, however, does not hit the same peak frequencies as Kryo 280, and Kryo 260 uses 1MB/1MB of shared L2 per cluster instead of 2MB/1MB of L2 for Kryo 280. 


The confusion probably is from the fact that while there are 2x2 sets of CPU cores on the chipset, Qualcomm's branding the package of the 2 "performance" and 2 "efficiency" cores as the Kryo CPU. The obfuscation is probably due to Qualcomm emphasizing their customization trying to differentiate from ARM's reference big.LITTLE A73/A53 CPU core set.

Honestly while GSM Arena is a good starting point, if there is confusion/conflict further research should be done.