Dread Bug w/ 6 turn:

X, X, X, X
X, X
X, X, X
X, X
X

...or...

X, X, X, X
X, X
X, X, X
X, X
X

vs. Assault Refit/Fleet Assault w/ 7 turn:

X, X, X
X
X, X, X, X
X, X
X, X

As for consoles, both the Fleet Assault and Dread Bug are 4/4/2 (while the Refit is 3/4/2).

Assault sports .15 Impulse.
Dread Bug .17 Impulse.
Assault sports 30 Inertia.
What does the Dread Bug have though?

Also, the Dread Bug's at 45k hull with a 1.15 shield modifier vs. 42.9k/1.1 for the Fleet and 39k/1 for the Refit...

For comparison - Heavy Bug:
37.5k Hull
1 Shield Modifier
12 Turn
.2 Impulse
? Inertia
4/4/2 consoles

X, X, X, X
X, X, X
X, X
X
X, X

So, you could basically do the same layout on the Dread and Heavy:

X, X, X, X
X, X
X, X, X
X, X
X

The Dread would have +7.5k hull and a +1.15 shield modifier (as well as +1 hangar, +5 aux power).
The Heavy would have +6 turn and +0.03 impulse (as well as +5 shield power).
Inertia?

Which would you say has better survivability?

Then again, folks may want the following Heavy layout for the Dread:

X, X, X, X
X, X, X
X, X
X, X
X