Too bad that you can't hear them both, so I will give you some broad observations. The Rega has great pace and a sense of the music moving forward, what the Brits call PRaT. The leading edges of notes are handled very well with a sense of attack and purpose. Most turntables sound a bit slow and lazy in comparison. Mid bass had great slam and bite, with the low bass being somewhat down in level.
The VPI tables have a greater sense of body to the tone. The chest cavity of male singers and the foundational sounds in the lower midrange are more prominent. The lower to central midrange is a focus, where with the Rega the focus tilts a bit to the upper midrange. There is a pleasing warmth and naturalness to the tone. Decay of notes is more defined and that leads to a greater sense of hall ambiance. Backgrounds seem a bit darker. Bass goes deeper with less sense of ultimate slam but more rewarding weight.
It is quite easy to set the VTA on Rega tables, either by getting the shim set from Rega or one of the after market continuous VTA adjusters.
I don't think it matters much which I prefer.
The VPI tables have a greater sense of body to the tone. The chest cavity of male singers and the foundational sounds in the lower midrange are more prominent. The lower to central midrange is a focus, where with the Rega the focus tilts a bit to the upper midrange. There is a pleasing warmth and naturalness to the tone. Decay of notes is more defined and that leads to a greater sense of hall ambiance. Backgrounds seem a bit darker. Bass goes deeper with less sense of ultimate slam but more rewarding weight.
It is quite easy to set the VTA on Rega tables, either by getting the shim set from Rega or one of the after market continuous VTA adjusters.
I don't think it matters much which I prefer.