I've used both, I tend to prefer the bi-wire simply because more copper/silver get to the speaker rather than utilizing a tiny little jumper.
I typically notice better bass response.
Main: McIntosh XRT1K MDA1000 MC402 | JL F113 | Bryston BUC-1 | WireWorld Cabling | RGPC1200C | PPP
Office: Bel Canto S300iu 24/96 | KEF LS50 | REL R218 | WW Mini Eclipse | 6.3 TB Media Server
Mobile: McIntosh MX406 MDA5000 MCD4000 MCC420M | JM Lab/Focal Utopia