They sould be renamed.Titan sounds lame, BF2142 anyone?
I rather like the sound of "Titan". It conveys a sense, of, I don't know, titanic proportions or power.
TBH, I'm certain that you're the only one who's attempted to draw a parallel between Sins Titans and '2142 Titans. They are similar in name alone, really.
The awesome class name Super Star Destroyers was already taken so they choose Titan instead.
Tib I like the TEC titan and some of the Vasari but the Advent needs a little more love.
I really hate big, beefy ships called "destroyers". It makes no sense from the point-of-view of proper naval nomenclature. This is one thing, IMO, that separates Warhammer 40,000 better than some scifi settings. Destroyers are, properly, the smallest class of interstellar-capable warship.
Further, the "Super Star Destroyers" were actually "Star Dreadnoughts" in type classification, and "SSD" in standard nomenclature.
Also, TEC need some love too. They have a late-game dependant on keeping an advantage during the early game.
@OP:
My personal opinions are that, 1-on-1, standard fight using raw DPS, a Titan should (barely) lose to a Starbase of equal capabilities.
Instead, a Titan should have a long-range standoff ability that can be directed at a Starbase from beyond it's engagement range (barring strikecraft) and do massive damage. This would allow the Titan to basically "alpha-strike" the SB, allowing the Titan to enter into a raw DPS-based slugging match with the SB on a significant advantage (more health).
To balance the ability, it would only be coded to be capable of targeting starbases and other Titans.