It's a bit like a 'Christina or Britney' question, you wouldn't turn either down...
In terms of performance, both are great when set up properly. E-01 needs an external signal harness to display the full range ot data, but it's cheap to buy and allows data logging then of Lambda etc, comes in handy for tuning your car. AVCR allows gear based boost, useful for cars with traction issues - that's not me then! Hopefully one day I'll have enough power to make traction an issue even with 4wd...
To be honest, it's only worth paying for a top line boost controller if you really are going to use all those features, otherwise you might as well go for a Profec B, simple fit and works well. I bought the E-Manage and E-01 together as I couldn't justify a full stand alone management but needed more flexibility than jsut the AVCR + SAFC allowed. The fact that the $ is so low againt the £ makes them a cheap option if you import at the moment.
