ALT-DVB Features:

Modular hardware interface (now available for SkyStar1 & SkyStar2)
Fast startup
Parallel transponder scanning
Native DiseqC (no plugin needed;for SkyStar2 use driver patched by MiBi)
Integrated Program Guide (EPG)
Accept Multidec compatible plugins
Complete channel information , including elementary streams & conditional access
Channel list filter
Independent channel volume control
Fast channel switch

SkyStar1:
Quick hardware initialization in (~2.5 sec ,including boot)
Direct DVB_COMMAND (with any version of ttdvbacc.dll and firmware 2.10 & 2.16)


SkyStar2:
DirectShow filters configurable by .GRF file
Picture-in-Picture (PIP) including encripted channels
Maximum 4 simulteneous recording with additional streams (AUDIO,TTX,PMT..) 
 - only active chan. is recorded in decripted form
 - recorded channels must be on the same transponder