Insolidus and Silka are very similar choirs. Recorded with the same singers in the same style and dynamics....and the same space too.So what exactly makes Silka different enough? They seem too similar to me when I listen to youtube stuff that has them. Insolidus has the sequencer as well.
Look at it like this. They do the same thing, except Insolidus adds the basics (sustains, etc) that Silka doesn't have. Silka basically takes Insolidus....removes the icing (which is already very good) and brings back an even better prettier icing and adds it straight on top of the Insolidus icing. Silka is almost all icing. Insolidus still gives you the cake too. Basically you have so much tasty pretty icing with both, that the options are limitless.
Ive said it enough times. 8dio needs to sell them as 1 super amazing 'arcs' choir.