Hi I have played several David Argent lattice guitars in both spruce and cedar. They have a very immediate attack, great volume and sustain, with spruce having the edge in terms of clarity I'd say. They are very comfortable for the left hand, but they are very heavy instruments, which puts some people off. I like them as they have lattice qualities, but with a more traditional sound.
Philip Woodfield makes superb guitar and I think he's very good value. I've tried a spruce top lattice, and a spruce Series II guitar, both of which were excellent; great volume and sustain, easy playability and look like works of art. The series II uses carbon fibre with fan bracing, so while the lattice is a little louder I'd say the Series II had more tonal variety. I've recently played a Series II with soundports which give it an even more open, powerful sound.
Both makers are of very high quality, if I were to pick one it would be the Woodfield Series II, but of course that's very personal and subjective.