| Features | Viper GC | Viper GC Extreme | Ripper///GC | NinjaMod | Qoob Pro | Qoob SX | Xeno GC | DuoQ |
| BIOS Size | 128K | 16Mbit | 1Mbit | 16Mbit | 16Mbit | 128K | Unknown | Unknown |
| Flashable? | YES | Yes | YES | YES | YES | YES | No | No |
| Flash Using | DVD/Adapter | DVD/USB | PCI Device | DVD/BBA | DVD, BBA, USB | DVD, BBA | N/A | N/A |
| Flash Adapter Included | YES | Yes | NO | NO | YES | YES | N/A | N/A |
| Flash w/o Cube | NO | No | NO | NO | YES | NO | N/A | N/A |
| # Wires to Install | 4 | 4 | 5 | 7 | 6 | 6 | 6 | 9 |
| Other Installs | Lid Plug | Lid Plug | Wire Loop | Wire Loop | Lid Plug | Lid Plug | No | LED PCB |
| Installation Rating | Easy | Easy | Moderate | Hard | Easy | Easy | Moderate | Moderate |
| Memory Banks | 1 | 1 | 1 | 2 | 32 | 1 | 1 | 1 |
| Test Feature | NO | LED | LED | NO | LED | LED | LED | LED |
| DOL-001 / 002 | YES / YES | YES / YES | YES / NO | YES / YES | YES / YES | YES / YES | YES / YES | YES / YES |
| DOL-101, PQ | YES / YES | YES / YES | YES / NO | YES / NO | YES / YES | YES / YES | YES / YES | YES / YES |
| PAL / JAP / USA | Y / Y / Y | Y / Y / Y | Y / Y / Y | Y / Y / Y | Y / Y / Y | Y / Y / Y | Y / Y / Y | Y / Y / Y |
| Average Price | $50 USD | $65 USD | $35 USD | $40 USD | $65 USD | $45 USD | $20 USD | $15 USB |