Has kit performance changed between V1 and V2?

No. CORALL V2 provides excellent performance and reproducibility that is highly consistent with CORALL V1.

CORALL V2 shows an exceptional performance on challenging samples and an improved accuracy, thanks to the built-in Unique Molecular Identifiers (UMIs).
CORALL V2 kits also include Unique Dual Indexes (UDIs), for maximized sequencing output on all sequencers.