REDDI has one tube, a 6N1P, which is kinda sorta similar to a 12AX7 but can't be used interchangeably. But it also has a pretty large output transformer that's 4 or 5 lbs. as compared to the Jensen, which is quite small. Jensens are cool, but the big OT makes a big difference in tubiness, which puts it and the Evil Twin in a different category. This Noble reminds me most of all of a cross between the SVT-DI and the Sansamp BDDI with its 2 band preamp. Probably sounds good, but I don't know that I'd expect REDDI-level tubiness.
Ampeg Portaflex Club #1