Firestone Audio Tobby vs Musical Fidelity Trivista 21 DAC

Has anyone listened to both of these DACs and can comment on the comparison? I have the Tobby currently and that is the only DAC I have experience with. The Trivista is quite a bit older but seems to have similar specs as the Tobby.  I listen mostly to LPs through tubes and prefer that sound. My digital library is growing, though, (mostly FLAC) and I would like the best affordable option in a DAC. Thanks in advance!