Very different sounding these 2. The aqvox is only viable using mc input (mm is rubbish in this phonostage) - mc input uses current amplification and $ for $ provides exceptional resolution and detail, with a wide soundstage (not overly deep). The Aqvox sounds ever so slightly clinical so matching with the rest of your system will be critical as will choice of cartridge. There is also option to bypass coupling caps, which greatly improves it still further.
Rega Aria not cut from this same cloth - it looks to present more a holistic musical picture rather than letting your hear absolutely everything on your lp. Whether this presentation is for you will depend on other ancillaries.
I would personally take a fully balanced signal from my tt straight to aqvox without coupling caps and thence to a tube preamp and then your choice of ss/tube power and speakers.
Rega Aria not cut from this same cloth - it looks to present more a holistic musical picture rather than letting your hear absolutely everything on your lp. Whether this presentation is for you will depend on other ancillaries.
I would personally take a fully balanced signal from my tt straight to aqvox without coupling caps and thence to a tube preamp and then your choice of ss/tube power and speakers.