It is versatile, but it requires understanding how to set it up, and of course, the right speaker cab.
I have both. They serve different purposes. For additional background, I played only Two-Rocks for about 12 years.
The Fillmore 50 does a more 'Tweed' sound, that morphs via its settings to more 'Mesa' sounds. A great amp - provided you have the right speakers, which in my case are Jensen Alnico Blackbirds (I actually ordered a California Tweed cab in custom colors to match my Fillmore). With the stock C-90 Black Shadow speakers, it floats my boat...well, let's just say, not as much.
The Fillmore is a circuit board amp, the DG30 is mostly handwired. As a Two Rock player, this may or may not matter to you.
I also retubed my Fillmore with NOS GE tubes to get really happy with it, BUT I also retubed my T-Rs with NOS after T-R stopped installing NOS as standard. So...I'm that guy.
The DG30 is a DIFFERENT type of beast. It's got EL84M output tubes - similar but different to AC30 topology - and its tone stack is inspired by a Hiwatt tone stack. The preamp also has some Tweed elements.
The DG30 can do a lot of things, and so can the Fillmore. But they're different, and both are worth owning.
The DG30 is the most unique sounding amp I own. I love it. When I turn the DG30 on after playing through the Fillmore 50, I always think, "Here's the Mac Daddy of them all."
On the other hand, my son, who's got three gold records as a mixer, producer (and also played guitar on the records) thinks my Fillmore is the best of my amps.
But he's a fender player. So WTF does he know?
Does this help? If not, I can send a clip of tracks done with the DG30. Fillmore tracks are all over the web.