Yep, the STR-Tremolo will have the same soul and basic circuit as the STR-Tweed, just with:

• The addition of a great tremolo stage
  (along with same quality Reverb stage)
  
  
• Mojotone 12" Speaker 
• The addition of  a 3 way EQ Switch that makes
  the STR-Trem more flexible
  
  
• As stock in the original STR "Tuxedo" 60s style cab
  & a limited run of AST Style Tweed cabs

Push comes to shove, I think the STR-Tremolo does have a touch less gain than the STR-Treed as the Tremolo section will take place of the extra gain stage in half of the 12AX7.  On the other hand, it will still have much of the STR-Tweed's great tone, immediacy,  growl, and touch sensitivity.  Drop in the Atomic Boost, and you get it back and more.  I really dig this amp and have been playing it daily since we finally got it off the bench.