I noticed that spec as significant. The Kisae should allow for 2S2P 100w 12v panels instead of the 4P required by the RenogyThe Kisae has a max solar input voltage of 50V which is more practical than the Renogy's 25V max limit.
One thing I like about the Renogy is that it appears to be able to charge from the Alternator and from the Solar simultaneously, where the Kisae appears to charge from one or the other , but not both, with a selectable default.