I had a back to back dyno run with the CEFF1E remap on my RB20, nothing changed down low, the AFR curve was EXACTLY the same. Only thing that happened was I gained 5hp up high.. tuner said it was probably due to an extra degree or so of timing up high.
The only benefit of my getting that remap was that it didn't have R&R, so I was able to run my RB30 on it for a while and it saved me about $200 off the proper tune as I already had an ecu with a cradle soldered in.
My advice, ring Hyperdrive and get a real tune/remap